From 2fbc41227c9a00fa637d452683d8bed440bbe488 Mon Sep 17 00:00:00 2001
From: Arjan <arjanpingale@gmail.com>
Date: Wed, 22 Jul 2026 11:44:40 +0530
Subject: [PATCH 01/11] feat: add package setup

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
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    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown_pkg_readmes
    status: na
  - task: lint_markdown_docs
    status: na
  - task: lint_markdown
    status: na
  - task: lint_package_json
    status: passed
  - task: lint_repl_help
    status: na
  - task: lint_javascript_src
    status: passed
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: na
  - task: lint_javascript_tests
    status: na
  - task: lint_javascript_benchmarks
    status: na
  - task: lint_python
    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
    status: na
  - task: lint_c_examples
    status: na
  - task: lint_c_benchmarks
    status: na
  - task: lint_c_tests_fixtures
    status: na
  - task: lint_shell
    status: na
  - task: lint_typescript_declarations
    status: passed
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---
---
 .../@stdlib/stats/incr/nanwmean/lib/index.js  |  54 ++++++++
 .../@stdlib/stats/incr/nanwmean/lib/main.js   | 120 ++++++++++++++++++
 .../@stdlib/stats/incr/nanwmean/package.json  |  69 ++++++++++
 3 files changed, 243 insertions(+)
 create mode 100644 lib/node_modules/@stdlib/stats/incr/nanwmean/lib/index.js
 create mode 100644 lib/node_modules/@stdlib/stats/incr/nanwmean/lib/main.js
 create mode 100644 lib/node_modules/@stdlib/stats/incr/nanwmean/package.json

diff --git a/lib/node_modules/@stdlib/stats/incr/nanwmean/lib/index.js b/lib/node_modules/@stdlib/stats/incr/nanwmean/lib/index.js
new file mode 100644
index 000000000000..60b564920f27
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/incr/nanwmean/lib/index.js
@@ -0,0 +1,54 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2019 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+/**
+* Compute a weighted arithmetic mean incrementally, ignoring NaN parameters.
+*
+* @module @stdlib/stats/incr/nanwmean
+*
+* @example
+* var incrnanwmean = require( '@stdlib/stats/incr/nanwmean' );
+*
+* var accumulator = incrnanwmean();
+*
+* var mu = accumulator();
+* // returns null
+*
+* mu = accumulator( 2.0, 1.0 );
+* // returns 2.0
+*
+* mu = accumulator( 2.0, 0.5 );
+* // returns 2.0
+*
+* mu = accumulator( 3.0, 1.5 );
+* // returns 2.5
+*
+* mu = accumulator();
+* // returns 2.5
+*/
+
+// MODULES //
+
+var main = require( './main.js' );
+
+
+// EXPORTS //
+
+module.exports = main;
diff --git a/lib/node_modules/@stdlib/stats/incr/nanwmean/lib/main.js b/lib/node_modules/@stdlib/stats/incr/nanwmean/lib/main.js
new file mode 100644
index 000000000000..bb582a4d5022
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/incr/nanwmean/lib/main.js
@@ -0,0 +1,120 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2019 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var isnan = require( '@stdlib/math/base/assert/is-nan' );
+var incrwmean = require( '@stdlib/stats/incr/wmean' );
+
+
+// MAIN //
+
+/**
+* Returns an accumulator function which incrementally computes a weighted arithmetic mean, ignoring `NaN` parameters.
+*
+* ## Method
+*
+* -   The weighted arithmetic mean is defined as
+*
+*     ```tex
+*     \mu = \frac{\sum_{i=0}^{n-1} w_i x_i}{\sum_{i=0}^{n-1} w_i}
+*     ```
+*
+*     where \\( w_i \\) are the weights.
+*
+* -   The weighted arithmetic mean is equivalent to the simple arithmetic mean when all weights are equal.
+*
+*     ```tex
+*     \begin{align*}
+*     \mu &= \frac{\sum_{i=0}^{n-1} w x_i}{\sum_{i=0}^{n-1} w} \\
+*         &= \frac{w\sum_{i=0}^{n-1} x_i}{nw} \\
+*         &= \frac{1}{n} \sum_{i=0}^{n-1}
+*     \end{align*}
+*     ```
+*
+* -   If the weights are different, then one can view weights either as sample frequencies or as a means to calculate probabilities where \\( p_i = w_i / \sum w_i \\).
+*
+* -   To derive an incremental formula for computing a weighted arithmetic mean, let
+*
+*     ```tex
+*     W_n = \sum_{i=1}^{n} w_i
+*     ```
+*
+* -   Accordingly,
+*
+*     ```tex
+*     \begin{align*}
+*     \mu_n &= \frac{1}{W_n} \sum_{i=1}^{n} w_i x_i \\
+*         &= \frac{1}{W_n} \biggl(w_n x_n + \sum_{i=1}^{n-1} w_i x_i \biggr) \\
+*         &= \frac{1}{W_n} (w_n x_n + W_{n-1} \mu_{n-1}) \\
+*         &= \frac{1}{W_n} (w_n x_n + (W_n - w_n) \mu_{n-1}) \\
+*         &= \frac{1}{W_n} (W_n \mu_{n-1} + w_n x_n - w_n\mu_{n-1}) \\
+*         &= \mu_{n-1} + \frac{w_n}{W_n} (x_n - \mu_{n-1})
+*     \end{align*}
+*     ```
+*
+* @returns {Function} accumulator function
+*
+* @example
+* var accumulator = incrnanwmean();
+*
+* var mu = accumulator();
+* // returns null
+*
+* mu = accumulator( 2.0, 1.0 );
+* // returns 2.0
+*
+* mu = accumulator( 2.0, 0.5 );
+* // returns 2.0
+*
+* mu = accumulator( 3.0, 1.5 );
+* // returns 2.5
+*
+* mu = accumulator();
+* // returns 2.5
+*/
+function incrnanwmean() {
+	var acc = incrwmean();
+
+	return accumulator;
+
+	/**
+	* If provided arguments, the accumulator function returns an updated weighted mean. If not provided arguments, the accumulator function returns the current weighted mean.
+	*
+	* @private
+	* @param {number} [x] - value
+	* @param {number} [w] - weight
+	* @returns {(number|null)} weighted mean or null
+	*/
+	function accumulator( x, w ) {
+		if ( arguments.length === 0 ) {
+			return acc();
+		}
+		if ( isnan( x ) || isnan( w ) ) {
+			return acc();
+		}
+		return acc( x, w );
+	}
+}
+
+
+// EXPORTS //
+
+module.exports = incrnanwmean;
diff --git a/lib/node_modules/@stdlib/stats/incr/nanwmean/package.json b/lib/node_modules/@stdlib/stats/incr/nanwmean/package.json
new file mode 100644
index 000000000000..7826d734f5f7
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/incr/nanwmean/package.json
@@ -0,0 +1,69 @@
+{
+  "name": "@stdlib/stats/incr/nanwmean",
+  "version": "0.0.0",
+  "description": "Compute a weighted arithmetic mean incrementally, ignoring NaN values.",
+  "license": "Apache-2.0",
+  "author": {
+    "name": "The Stdlib Authors",
+    "url": "https://github.com/stdlib-js/stdlib/graphs/contributors"
+  },
+  "contributors": [
+    {
+      "name": "The Stdlib Authors",
+      "url": "https://github.com/stdlib-js/stdlib/graphs/contributors"
+    }
+  ],
+  "main": "./lib",
+  "directories": {
+    "benchmark": "./benchmark",
+    "doc": "./docs",
+    "example": "./examples",
+    "lib": "./lib",
+    "test": "./test"
+  },
+  "types": "./docs/types",
+  "scripts": {},
+  "homepage": "https://github.com/stdlib-js/stdlib",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/stdlib-js/stdlib.git"
+  },
+  "bugs": {
+    "url": "https://github.com/stdlib-js/stdlib/issues"
+  },
+  "dependencies": {},
+  "devDependencies": {},
+  "engines": {
+    "node": ">=0.10.0",
+    "npm": ">2.7.0"
+  },
+  "os": [
+    "aix",
+    "darwin",
+    "freebsd",
+    "linux",
+    "macos",
+    "openbsd",
+    "sunos",
+    "win32",
+    "windows"
+  ],
+  "keywords": [
+    "stdlib",
+    "stdmath",
+    "statistics",
+    "stats",
+    "mathematics",
+    "math",
+    "average",
+    "avg",
+    "mean",
+    "arithmetic mean",
+    "central tendency",
+    "incremental",
+    "accumulator",
+    "weighted",
+    "nan",
+    "ignore"
+  ]
+}

From 51c04690bf4eaeecfcc7c29767a79555c6313754 Mon Sep 17 00:00:00 2001
From: Arjan <arjanpingale@gmail.com>
Date: Wed, 22 Jul 2026 11:48:57 +0530
Subject: [PATCH 02/11] feat: add benchmark.js

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown_pkg_readmes
    status: na
  - task: lint_markdown_docs
    status: na
  - task: lint_markdown
    status: na
  - task: lint_package_json
    status: na
  - task: lint_repl_help
    status: na
  - task: lint_javascript_src
    status: na
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: na
  - task: lint_javascript_tests
    status: na
  - task: lint_javascript_benchmarks
    status: passed
  - task: lint_python
    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
    status: na
  - task: lint_c_examples
    status: na
  - task: lint_c_benchmarks
    status: na
  - task: lint_c_tests_fixtures
    status: na
  - task: lint_shell
    status: na
  - task: lint_typescript_declarations
    status: passed
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---
---
 .../incr/nanwmean/benchmark/benchmark.js      | 70 +++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 lib/node_modules/@stdlib/stats/incr/nanwmean/benchmark/benchmark.js

diff --git a/lib/node_modules/@stdlib/stats/incr/nanwmean/benchmark/benchmark.js b/lib/node_modules/@stdlib/stats/incr/nanwmean/benchmark/benchmark.js
new file mode 100644
index 000000000000..e50f87db610b
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/incr/nanwmean/benchmark/benchmark.js
@@ -0,0 +1,70 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2019 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var bench = require( '@stdlib/bench' );
+var randu = require( '@stdlib/random/base/randu' );
+var format = require( '@stdlib/string/format' );
+var pkg = require( './../package.json' ).name;
+var incrnanwmean = require( './../lib' );
+
+
+// MAIN //
+
+bench( pkg, function benchmark( b ) {
+	var f;
+	var i;
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		f = incrnanwmean();
+		if ( typeof f !== 'function' ) {
+			b.fail( 'should return a function' );
+		}
+	}
+	b.toc();
+	if ( typeof f !== 'function' ) {
+		b.fail( 'should return a function' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});
+
+bench( format( '%s::accumulator', pkg ), function benchmark( b ) {
+	var acc;
+	var v;
+	var i;
+
+	acc = incrnanwmean();
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		v = acc( randu(), 1.0 );
+		if ( v !== v ) {
+			b.fail( 'should not return NaN' );
+		}
+	}
+	b.toc();
+	if ( v !== v ) {
+		b.fail( 'should not return NaN' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});

From eba692272f102b1bfa0d5a2a26f70b083981aaed Mon Sep 17 00:00:00 2001
From: Arjan <arjanpingale@gmail.com>
Date: Wed, 22 Jul 2026 11:52:34 +0530
Subject: [PATCH 03/11] feat: add type decleration

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
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    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown_pkg_readmes
    status: na
  - task: lint_markdown_docs
    status: na
  - task: lint_markdown
    status: na
  - task: lint_package_json
    status: na
  - task: lint_repl_help
    status: na
  - task: lint_javascript_src
    status: na
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: na
  - task: lint_javascript_tests
    status: na
  - task: lint_javascript_benchmarks
    status: na
  - task: lint_python
    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
    status: na
  - task: lint_c_examples
    status: na
  - task: lint_c_benchmarks
    status: na
  - task: lint_c_tests_fixtures
    status: na
  - task: lint_shell
    status: na
  - task: lint_typescript_declarations
    status: passed
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---
---
 .../stats/incr/nanwmean/docs/types/index.d.ts | 64 +++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 lib/node_modules/@stdlib/stats/incr/nanwmean/docs/types/index.d.ts

diff --git a/lib/node_modules/@stdlib/stats/incr/nanwmean/docs/types/index.d.ts b/lib/node_modules/@stdlib/stats/incr/nanwmean/docs/types/index.d.ts
new file mode 100644
index 000000000000..3cf9249c18c0
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/incr/nanwmean/docs/types/index.d.ts
@@ -0,0 +1,64 @@
+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2019 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+// TypeScript Version: 4.1
+
+/// <reference types="@stdlib/types"/>
+
+/**
+* If provided both arguments, returns an updated weighted arithmetic mean; otherwise, returns the current weighted arithmetic mean.
+*
+* ## Notes
+*
+* -   If provided `NaN` or a value which, when used in computations, results in `NaN`, the accumulated value is `NaN` for all future invocations.
+*
+* @param x - value
+* @param w - weight
+* @returns weighted arithmetic mean
+*/
+type accumulator = ( x?: number, w?: number ) => number | null;
+
+/**
+* Returns an accumulator function which incrementally computes a weighted arithmetic mean.
+*
+* @returns accumulator function
+*
+* @example
+* var accumulator = incrnanwmean();
+*
+* var mu = accumulator();
+* // returns null
+*
+* mu = accumulator( 2.0, 1.0 );
+* // returns 2.0
+*
+* mu = accumulator( 2.0, 0.5 );
+* // returns 2.0
+*
+* mu = accumulator( 3.0, 1.5 );
+* // returns 2.5
+*
+* mu = accumulator();
+* // returns 2.5
+*/
+declare function incrnanwmean(): accumulator;
+
+
+// EXPORTS //
+
+export = incrnanwmean;

From d094f83812aa14204cd5b8a8dd16505703c460be Mon Sep 17 00:00:00 2001
From: Arjan <arjanpingale@gmail.com>
Date: Wed, 22 Jul 2026 13:19:57 +0530
Subject: [PATCH 04/11] feat: add /docs/types/test.ts

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown_pkg_readmes
    status: na
  - task: lint_markdown_docs
    status: na
  - task: lint_markdown
    status: na
  - task: lint_package_json
    status: na
  - task: lint_repl_help
    status: na
  - task: lint_javascript_src
    status: na
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: na
  - task: lint_javascript_tests
    status: na
  - task: lint_javascript_benchmarks
    status: na
  - task: lint_python
    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
    status: na
  - task: lint_c_examples
    status: na
  - task: lint_c_benchmarks
    status: na
  - task: lint_c_tests_fixtures
    status: na
  - task: lint_shell
    status: na
  - task: lint_typescript_declarations
    status: passed
  - task: lint_typescript_tests
    status: passed
  - task: lint_license_headers
    status: passed
---
---
 .../stats/incr/nanwmean/docs/types/test.ts    | 70 +++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 lib/node_modules/@stdlib/stats/incr/nanwmean/docs/types/test.ts

diff --git a/lib/node_modules/@stdlib/stats/incr/nanwmean/docs/types/test.ts b/lib/node_modules/@stdlib/stats/incr/nanwmean/docs/types/test.ts
new file mode 100644
index 000000000000..a6d405af525f
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/incr/nanwmean/docs/types/test.ts
@@ -0,0 +1,70 @@
+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2019 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+import incrwmean = require( './index' );
+
+
+// TESTS //
+
+// The function returns an accumulator function...
+{
+	incrwmean(); // $ExpectType accumulator
+}
+
+// The compiler throws an error if the function is provided arguments...
+{
+	incrwmean( '5' ); // $ExpectError
+	incrwmean( 5 ); // $ExpectError
+	incrwmean( true ); // $ExpectError
+	incrwmean( false ); // $ExpectError
+	incrwmean( null ); // $ExpectError
+	incrwmean( undefined ); // $ExpectError
+	incrwmean( [] ); // $ExpectError
+	incrwmean( {} ); // $ExpectError
+	incrwmean( ( x: number ): number => x ); // $ExpectError
+}
+
+// The function returns an accumulator function which returns an accumulated result...
+{
+	const acc = incrwmean();
+
+	acc(); // $ExpectType number | null
+	acc( 3.14, 1.0 ); // $ExpectType number | null
+}
+
+// The compiler throws an error if the returned accumulator function is provided invalid arguments...
+{
+	const acc = incrwmean();
+
+	acc( '5', 1.0 ); // $ExpectError
+	acc( true, 1.0 ); // $ExpectError
+	acc( false, 1.0 ); // $ExpectError
+	acc( null, 1.0 ); // $ExpectError
+	acc( [], 1.0 ); // $ExpectError
+	acc( {}, 1.0 ); // $ExpectError
+	acc( ( x: number ): number => x, 1.0 ); // $ExpectError
+
+	acc( 3.14, '5' ); // $ExpectError
+	acc( 3.14, true ); // $ExpectError
+	acc( 3.14, false ); // $ExpectError
+	acc( 3.14, null ); // $ExpectError
+	acc( 3.14, [] ); // $ExpectError
+	acc( 3.14, {} ); // $ExpectError
+	acc( 3.14, ( x: number ): number => x ); // $ExpectError
+}
+

From 2523ca330413203dde421e464f47195be2c1b199 Mon Sep 17 00:00:00 2001
From: Arjan <arjanpingale@gmail.com>
Date: Wed, 22 Jul 2026 13:23:22 +0530
Subject: [PATCH 05/11] feat: add /examples/index.js

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown_pkg_readmes
    status: na
  - task: lint_markdown_docs
    status: na
  - task: lint_markdown
    status: na
  - task: lint_package_json
    status: na
  - task: lint_repl_help
    status: na
  - task: lint_javascript_src
    status: na
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: passed
  - task: lint_javascript_tests
    status: na
  - task: lint_javascript_benchmarks
    status: na
  - task: lint_python
    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
    status: na
  - task: lint_c_examples
    status: na
  - task: lint_c_benchmarks
    status: na
  - task: lint_c_tests_fixtures
    status: na
  - task: lint_shell
    status: na
  - task: lint_typescript_declarations
    status: passed
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---
---
 .../stats/incr/nanwmean/examples/index.js     | 41 +++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 lib/node_modules/@stdlib/stats/incr/nanwmean/examples/index.js

diff --git a/lib/node_modules/@stdlib/stats/incr/nanwmean/examples/index.js b/lib/node_modules/@stdlib/stats/incr/nanwmean/examples/index.js
new file mode 100644
index 000000000000..6707465164d2
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/incr/nanwmean/examples/index.js
@@ -0,0 +1,41 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2019 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+var randu = require( '@stdlib/random/base/randu' );
+var incrnanwmean = require( './../lib' );
+
+var accumulator;
+var mu;
+var x;
+var w;
+var i;
+
+// Initialize an accumulator:
+accumulator = incrnanwmean();
+
+// For each simulated datum, update the weighted mean...
+console.log( '\nValue\tWeight\tWeighted Mean\n' );
+for ( i = 0; i < 100; i++ ) {
+	x = randu() * 100.0;
+	w = randu() * 100.0;
+	mu = accumulator( x, w );
+	console.log( '%d\t%d\t%d', x.toFixed( 4 ), w.toFixed( 4 ), mu.toFixed( 4 ) );
+}
+console.log( '\nFinal weighted mean: %d\n', accumulator() );

From 46965a0d4c91cd8387ebfb938832858533b73397 Mon Sep 17 00:00:00 2001
From: Arjan <arjanpingale@gmail.com>
Date: Wed, 22 Jul 2026 13:26:12 +0530
Subject: [PATCH 06/11] feat: add repl.txt

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown_pkg_readmes
    status: na
  - task: lint_markdown_docs
    status: na
  - task: lint_markdown
    status: na
  - task: lint_package_json
    status: na
  - task: lint_repl_help
    status: passed
  - task: lint_javascript_src
    status: na
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: na
  - task: lint_javascript_tests
    status: na
  - task: lint_javascript_benchmarks
    status: na
  - task: lint_python
    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
    status: na
  - task: lint_c_examples
    status: na
  - task: lint_c_benchmarks
    status: na
  - task: lint_c_tests_fixtures
    status: na
  - task: lint_shell
    status: na
  - task: lint_typescript_declarations
    status: passed
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---
---
 .../@stdlib/stats/incr/nanwmean/docs/repl.txt | 37 +++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 lib/node_modules/@stdlib/stats/incr/nanwmean/docs/repl.txt

diff --git a/lib/node_modules/@stdlib/stats/incr/nanwmean/docs/repl.txt b/lib/node_modules/@stdlib/stats/incr/nanwmean/docs/repl.txt
new file mode 100644
index 000000000000..9bd20c5c64ad
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/incr/nanwmean/docs/repl.txt
@@ -0,0 +1,37 @@
+{{alias}}()
+    Returns an accumulator function which incrementally computes a weighted
+    arithmetic mean, ignoring `NaN` values.
+
+    If provided arguments, the accumulator function returns an updated weighted
+    mean. If not provided arguments, the accumulator function returns the
+    current weighted mean.
+
+    If a value is `NaN`, the accumulator function ignores the value and
+    maintains the current state.
+
+    The accumulator function accepts two arguments:
+
+    - x: value.
+    - w: weight.
+
+    Returns
+    -------
+    acc: Function
+        Accumulator function.
+
+    Examples
+    --------
+    > var accumulator = {{alias}}();
+    > var mu = accumulator()
+    null
+    > mu = accumulator( 2.0, 1.0 )
+    2.0
+    > mu = accumulator( NaN, 1.0 )
+    2.0
+    > mu = accumulator( 3.0, 1.0 )
+    2.5
+    > mu = accumulator()
+    2.5
+
+    See Also
+    --------

From 5d4e04c17e1b49662f391ca145f099a05e81aef1 Mon Sep 17 00:00:00 2001
From: Arjan <arjanpingale@gmail.com>
Date: Wed, 22 Jul 2026 13:50:54 +0530
Subject: [PATCH 07/11] feat: add /test

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown_pkg_readmes
    status: na
  - task: lint_markdown_docs
    status: na
  - task: lint_markdown
    status: na
  - task: lint_package_json
    status: na
  - task: lint_repl_help
    status: na
  - task: lint_javascript_src
    status: na
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: na
  - task: lint_javascript_tests
    status: passed
  - task: lint_javascript_benchmarks
    status: na
  - task: lint_python
    status: missing_dependencies
  - task: lint_r
    status: na
  - task: lint_c_src
    status: na
  - task: lint_c_examples
    status: na
  - task: lint_c_benchmarks
    status: na
  - task: lint_c_tests_fixtures
    status: na
  - task: lint_shell
    status: na
  - task: lint_typescript_declarations
    status: passed
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---
---
 .../nanwmean/test/fixtures/python/data.json   |   1 +
 .../nanwmean/test/fixtures/python/runner.py   |  88 +++++++++++++
 .../@stdlib/stats/incr/nanwmean/test/test.js  | 120 ++++++++++++++++++
 3 files changed, 209 insertions(+)
 create mode 100644 lib/node_modules/@stdlib/stats/incr/nanwmean/test/fixtures/python/data.json
 create mode 100644 lib/node_modules/@stdlib/stats/incr/nanwmean/test/fixtures/python/runner.py
 create mode 100644 lib/node_modules/@stdlib/stats/incr/nanwmean/test/test.js

diff --git a/lib/node_modules/@stdlib/stats/incr/nanwmean/test/fixtures/python/data.json b/lib/node_modules/@stdlib/stats/incr/nanwmean/test/fixtures/python/data.json
new file mode 100644
index 000000000000..9a1cc4fb45a4
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/incr/nanwmean/test/fixtures/python/data.json
@@ -0,0 +1 @@
+[{"step": 1, "x": 3.0471707975443136, "w": 3.9559294497604784, "mean": 3.0471707975443136}, {"step": 2, "x": -10.399841062404956, "w": 3.3577691973009576, "mean": -3.126444550583255}, {"step": 3, "x": 7.5045119580645725, "w": 3.555310355269042, "mean": 0.3509975744077484}, {"step": 4, "x": 9.405647163912139, "w": 3.925572252007643, "mean": 2.753544869877046}, {"step": 5, "x": -19.510351886538363, "w": 2.348687300137866, "mean": -0.2966862687887889}, {"step": 6, "x": -13.021795068623181, "w": 2.88683186016918, "mean": -2.1306885327326004}, {"step": 7, "x": 1.2784040316728538, "w": 0.7850052908255215, "mean": -2.0021205716643617}, {"step": 8, "x": -3.162425923435822, "w": 0.6611973603262699, "mean": -2.0378432392675006}, {"step": 9, "x": -0.16801157504288794, "w": 3.3751745127733113, "mean": -1.7838942273298977}, {"step": 10, "x": -8.5304392757358, "w": 2.4083714101013496, "mean": -2.379942511320534}, {"step": 11, "x": 8.793979748628285, "w": 2.8696569217578256, "mean": -1.3156926211374218}, {"step": 12, "x": 7.777919354289483, "w": 3.8484944013385256, "mean": -0.28571103145409305}, {"step": 13, "x": 0.6603069756121605, "w": 3.2101197680028952, "mean": -0.2040497079223875}, {"step": 14, "x": 11.272412069680328, "w": 2.81253906322418, "mean": 0.6028869213396181}, {"step": 15, "x": 4.675093422520456, "w": 2.8401150876525265, "mean": 0.872852516773853}, {"step": 16, "x": -8.592924628832382, "w": 1.5893554805068, "mean": 0.5342425491363226}, {"step": 17, "x": 3.6875078408249884, "w": 0.2510073893829031, "mean": 0.5519568003899903}, {"step": 18, "x": -9.588826008289988, "w": 2.239915207238576, "mean": 0.0678565402877354}, {"step": 19, "x": 8.784503013072726, "w": 1.1514648968156933, "mean": 0.2766434525404932}, {"step": 20, "x": -0.49925910986252897, "w": 2.1017903542507175, "mean": 0.2441410703285499}, {"step": 21, "x": -1.8486236354526056, "w": 4.281675059014014, "mean": 0.07959462355871812}, {"step": 22, "x": -6.809295444039414, "w": 1.2463034807401698, "mean": -0.07453994202242903}, {"step": 23, "x": 12.225413386740303, "w": 0.3856834342764235, "mean": 0.010039483490497911}, {"step": 24, "x": -1.5452948206880215, "w": 1.4787810709077833, "mean": -0.029914116527385744}, {"step": 25, "x": -4.283278221631072, "w": 1.5386094130567498, "mean": -0.14063615675192645}, {"step": 26, "x": -3.5213355048822956, "w": 3.343390922161786, "mean": -0.32163256326353584}, {"step": 27, "x": 5.323091855533487, "w": 2.829457546472264, "mean": -0.07696426621497057}, {"step": 28, "x": 3.6544406436407835, "w": 3.9411012246214265, "mean": 0.13548865366219276}, {"step": 29, "x": 4.1273261159598835, "w": 3.355136347604199, "mean": 0.3200323834598058}, {"step": 30, "x": 4.308210030078827, "w": 2.0912956210563456, "mean": 0.4317363357791127}, {"step": 31, "x": 21.416476008704613, "w": 4.08869988486357, "mean": 1.5212025421425204}, {"step": 32, "x": -4.064150163846156, "w": 0.9181673075477492, "mean": 1.4568355240616275}, {"step": 33, "x": -5.122427290715374, "w": 0.21128915835591636, "mean": 1.4394336829268486}, {"step": 34, "x": -8.137727282478778, "w": 0.5412345178006446, "mean": 1.3749825600895866}, {"step": 35, "x": 6.159794225754957, "w": 3.639560817922607, "mean": 1.582139838161509}, {"step": 36, "x": 11.289722927208917, "w": 2.3631984282317986, "mean": 1.8475743480392357}, {"step": 37, "x": -1.1394745765487508, "w": 0.8902317172646488, "mean": 1.8171205821224452}, {"step": 38, "x": -8.401564769625281, "w": 2.5551193980064815, "mean": 1.5266007308371616}, {"step": 39, "x": -8.244812156912396, "w": 0.8463293032945253, "mean": 1.435442529141028}, {"step": 40, "x": 6.505927878247011, "w": 3.511969837880907, "mean": 1.6244173800465052}, {"step": 41, "x": 7.432541712034423, "w": 2.2861657503127506, "mean": 1.761991460740914}, {"step": 42, "x": 5.4315426830519495, "w": 1.9670040078727644, "mean": 1.8352822469844088}, {"step": 43, "x": -6.655097072886943, "w": 1.577409236824595, "mean": 1.7014373651904717}, {"step": 44, "x": 2.3216132306671975, "w": 3.188384706282554, "mean": 1.7205884505077298}, {"step": 45, "x": 1.1668580914072821, "w": 1.8728817917116134, "mean": 1.7107231718926006}, {"step": 46, "x": 2.1868859672901295, "w": 0.5294846046488949, "mean": 1.7131094853391238}, {"step": 47, "x": 8.714287779481898, "w": 0.6782289203905251, "mean": 1.7577662372038756}, {"step": 48, "x": 2.2359554877468226, "w": 4.813298556292621, "mean": 1.7784750415795718}, {"step": 49, "x": 6.789135630718949, "w": 4.552045384467275, "mean": 1.9756181293054198}, {"step": 50, "x": 0.6757906948889146, "w": 3.5285649556726733, "mean": 1.9371486375865798}]
diff --git a/lib/node_modules/@stdlib/stats/incr/nanwmean/test/fixtures/python/runner.py b/lib/node_modules/@stdlib/stats/incr/nanwmean/test/fixtures/python/runner.py
new file mode 100644
index 000000000000..2540b53c5af5
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/incr/nanwmean/test/fixtures/python/runner.py
@@ -0,0 +1,88 @@
+#!/usr/bin/env python
+#
+# @license Apache-2.0
+#
+# Copyright (c) 2026 The Stdlib Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Generate fixtures."""
+
+import os
+import json
+import numpy as np
+
+# Get the file path:
+FILE = os.path.realpath(__file__)
+
+# Extract the directory in which this file resides:
+DIR = os.path.dirname(FILE)
+
+
+def gen(n, seed, name):
+    """Generate fixture data and write to file.
+
+    # Arguments
+
+    * `n`: number of samples
+    * `seed`: random number generator seed
+    * `name::str`: output filename
+
+    # Examples
+
+    ``` python
+    python> gen(50, 42, './data.json')
+    ```
+    """
+    # Initialize random number generator for reproducibility:
+    rng = np.random.default_rng(seed)
+
+    # Generate data:
+    x = rng.normal(loc=0.0, scale=10.0, size=n)
+    w = rng.uniform(0.1, 5.0, size=n)
+
+    # Store data to be written to file as a list of records:
+    records = []
+
+    for k in range(1, n + 1):
+        x_vals = x[:k]
+        w_vals = w[:k]
+
+        weighted_mean = np.average(x_vals, weights=w_vals)
+
+        records.append({
+            "step": k,
+            "x": float(x[k - 1]),
+            "w": float(w[k - 1]),
+            "mean": float(weighted_mean)
+        })
+
+    # Based on the script directory, create an output filepath:
+    filepath = os.path.join(DIR, name)
+
+    # Write the data to the output filepath as JSON:
+    with open(filepath, "w", encoding="utf-8") as outfile:
+        json.dump(records, outfile)
+
+    # Include trailing newline:
+    with open(filepath, "a", encoding="utf-8") as outfile:
+        outfile.write("\n")
+
+
+def main():
+    """Generate fixture data."""
+    gen(50, 42, "data.json")
+
+
+if __name__ == "__main__":
+    main()
diff --git a/lib/node_modules/@stdlib/stats/incr/nanwmean/test/test.js b/lib/node_modules/@stdlib/stats/incr/nanwmean/test/test.js
new file mode 100644
index 000000000000..97affe57155c
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/incr/nanwmean/test/test.js
@@ -0,0 +1,120 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2019 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var tape = require( 'tape' );
+var isnan = require( '@stdlib/math/base/assert/is-nan' );
+var isAlmostSameValue = require( '@stdlib/assert/is-almost-same-value' );
+var incrnanwmean = require( './../lib' );
+
+
+// FIXTURES //
+
+var data = require( './fixtures/python/data.json' );
+
+
+// TESTS //
+
+tape( 'main export is a function', function test( t ) {
+	t.ok( true, __filename );
+	t.strictEqual( typeof incrnanwmean, 'function', 'main export is a function' );
+	t.end();
+});
+
+tape( 'the function returns an accumulator function', function test( t ) {
+	t.strictEqual( typeof incrnanwmean(), 'function', 'returns expected value' );
+	t.end();
+});
+
+tape( 'the initial accumulated value is `null`', function test( t ) {
+	var acc = incrnanwmean();
+	t.strictEqual( acc(), null, 'returns expected value' );
+	t.end();
+});
+
+tape( 'the accumulator function incrementally computes a weighted arithmetic mean', function test( t ) {
+	var expected;
+	var actual;
+	var acc;
+	var N;
+	var x;
+	var w;
+	var i;
+
+	N = data.length;
+
+	acc = incrnanwmean();
+
+	for ( i = 0; i < N; i++ ) {
+		x = data[ i ].x;
+		w = data[ i ].w;
+		expected = data[ i ].mean;
+		actual = acc( x, w );
+		t.strictEqual( isAlmostSameValue( actual, expected, 150.0 ), true, 'within tolerance. x: ' + x + '. w: ' + w + '. Value: ' + actual + '. Expected: ' + expected + '.' );
+	}
+	t.end();
+});
+
+tape( 'if not provided arguments, the accumulator function returns the current weighted mean', function test( t ) {
+	var acc;
+	var N;
+	var i;
+
+	N = data.length;
+	acc = incrnanwmean();
+	for ( i = 0; i < N; i++ ) {
+		acc( data[ i ].x, data[ i ].w );
+	}
+	t.strictEqual( isAlmostSameValue( acc(), data[ N - 1 ].mean, 150.0 ), true, 'returns the current accumulated mean' );
+	t.end();
+});
+
+tape( 'the accumulator function incrementally computes a weighted arithmetic mean, ignoring NaN values', function test( t ) {
+	var acc = incrnanwmean();
+
+	t.strictEqual( acc( 2.0, 1.0 ), 2.0, 'returns 2.0' );
+	t.strictEqual( acc( NaN, 1.0 ), 2.0, 'ignores NaN, returns 2.0' );
+	t.strictEqual( acc( 3.0, 1.0 ), 2.5, 'returns 2.5' );
+	t.strictEqual( acc(), 2.5, 'returns 2.5' );
+	t.end();
+});
+
+tape( 'if not provided a weight, the accumulator function returns `NaN`', function test( t ) {
+	var acc = incrnanwmean();
+	t.strictEqual( isnan( acc( 2.0 ) ), true, 'returns expected value' );
+	t.strictEqual( isnan( acc( 3.14 ) ), true, 'returns expected value' );
+	t.end();
+});
+
+tape( 'if provided `NaN` for either a value or a weight, the accumulator function returns `NaN`', function test( t ) {
+	var acc = incrnanwmean();
+	t.strictEqual( acc( 2.0, NaN ), null, 'returns expected value' );
+	t.strictEqual( acc( 3.14, NaN ), null, 'returns expected value' );
+
+	acc = incrnanwmean();
+	t.strictEqual( acc( NaN, 1.0 ), null, 'returns expected value' );
+	t.strictEqual( acc( NaN, 1.0 ), null, 'returns expected value' );
+
+	acc = incrnanwmean();
+	t.strictEqual( acc( NaN, NaN ), null, 'returns expected value' );
+	t.strictEqual( acc( NaN, NaN ), null, 'returns expected value' );
+	t.end();
+});

From 16b52d2ad9620cc695e14c6e0826cc9b6d8e6f11 Mon Sep 17 00:00:00 2001
From: stdlib-bot <82920195+stdlib-bot@users.noreply.github.com>
Date: Wed, 22 Jul 2026 12:44:25 +0000
Subject: [PATCH 08/11] chore: update copyright years

---
 .../@stdlib/stats/incr/nanwmean/benchmark/benchmark.js          | 2 +-
 .../@stdlib/stats/incr/nanwmean/docs/types/index.d.ts           | 2 +-
 lib/node_modules/@stdlib/stats/incr/nanwmean/docs/types/test.ts | 2 +-
 lib/node_modules/@stdlib/stats/incr/nanwmean/examples/index.js  | 2 +-
 lib/node_modules/@stdlib/stats/incr/nanwmean/lib/index.js       | 2 +-
 lib/node_modules/@stdlib/stats/incr/nanwmean/lib/main.js        | 2 +-
 lib/node_modules/@stdlib/stats/incr/nanwmean/test/test.js       | 2 +-
 7 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/lib/node_modules/@stdlib/stats/incr/nanwmean/benchmark/benchmark.js b/lib/node_modules/@stdlib/stats/incr/nanwmean/benchmark/benchmark.js
index e50f87db610b..decb24624bbc 100644
--- a/lib/node_modules/@stdlib/stats/incr/nanwmean/benchmark/benchmark.js
+++ b/lib/node_modules/@stdlib/stats/incr/nanwmean/benchmark/benchmark.js
@@ -1,7 +1,7 @@
 /**
 * @license Apache-2.0
 *
-* Copyright (c) 2019 The Stdlib Authors.
+* Copyright (c) 2026 The Stdlib Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
diff --git a/lib/node_modules/@stdlib/stats/incr/nanwmean/docs/types/index.d.ts b/lib/node_modules/@stdlib/stats/incr/nanwmean/docs/types/index.d.ts
index 3cf9249c18c0..7d2319a96aa0 100644
--- a/lib/node_modules/@stdlib/stats/incr/nanwmean/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/stats/incr/nanwmean/docs/types/index.d.ts
@@ -1,7 +1,7 @@
 /*
 * @license Apache-2.0
 *
-* Copyright (c) 2019 The Stdlib Authors.
+* Copyright (c) 2026 The Stdlib Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
diff --git a/lib/node_modules/@stdlib/stats/incr/nanwmean/docs/types/test.ts b/lib/node_modules/@stdlib/stats/incr/nanwmean/docs/types/test.ts
index a6d405af525f..dae0781125ee 100644
--- a/lib/node_modules/@stdlib/stats/incr/nanwmean/docs/types/test.ts
+++ b/lib/node_modules/@stdlib/stats/incr/nanwmean/docs/types/test.ts
@@ -1,7 +1,7 @@
 /*
 * @license Apache-2.0
 *
-* Copyright (c) 2019 The Stdlib Authors.
+* Copyright (c) 2026 The Stdlib Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
diff --git a/lib/node_modules/@stdlib/stats/incr/nanwmean/examples/index.js b/lib/node_modules/@stdlib/stats/incr/nanwmean/examples/index.js
index 6707465164d2..38c24ffffb39 100644
--- a/lib/node_modules/@stdlib/stats/incr/nanwmean/examples/index.js
+++ b/lib/node_modules/@stdlib/stats/incr/nanwmean/examples/index.js
@@ -1,7 +1,7 @@
 /**
 * @license Apache-2.0
 *
-* Copyright (c) 2019 The Stdlib Authors.
+* Copyright (c) 2026 The Stdlib Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
diff --git a/lib/node_modules/@stdlib/stats/incr/nanwmean/lib/index.js b/lib/node_modules/@stdlib/stats/incr/nanwmean/lib/index.js
index 60b564920f27..32dfbd250786 100644
--- a/lib/node_modules/@stdlib/stats/incr/nanwmean/lib/index.js
+++ b/lib/node_modules/@stdlib/stats/incr/nanwmean/lib/index.js
@@ -1,7 +1,7 @@
 /**
 * @license Apache-2.0
 *
-* Copyright (c) 2019 The Stdlib Authors.
+* Copyright (c) 2026 The Stdlib Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
diff --git a/lib/node_modules/@stdlib/stats/incr/nanwmean/lib/main.js b/lib/node_modules/@stdlib/stats/incr/nanwmean/lib/main.js
index bb582a4d5022..f37417640620 100644
--- a/lib/node_modules/@stdlib/stats/incr/nanwmean/lib/main.js
+++ b/lib/node_modules/@stdlib/stats/incr/nanwmean/lib/main.js
@@ -1,7 +1,7 @@
 /**
 * @license Apache-2.0
 *
-* Copyright (c) 2019 The Stdlib Authors.
+* Copyright (c) 2026 The Stdlib Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
diff --git a/lib/node_modules/@stdlib/stats/incr/nanwmean/test/test.js b/lib/node_modules/@stdlib/stats/incr/nanwmean/test/test.js
index 97affe57155c..e5e330d22f39 100644
--- a/lib/node_modules/@stdlib/stats/incr/nanwmean/test/test.js
+++ b/lib/node_modules/@stdlib/stats/incr/nanwmean/test/test.js
@@ -1,7 +1,7 @@
 /**
 * @license Apache-2.0
 *
-* Copyright (c) 2019 The Stdlib Authors.
+* Copyright (c) 2026 The Stdlib Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.

From c884131f8339c4dc01256d4a2fe3af7129c2a900 Mon Sep 17 00:00:00 2001
From: Arjan <arjanpingale@gmail.com>
Date: Thu, 23 Jul 2026 18:35:15 +0530
Subject: [PATCH 09/11] fix: apply suggested changes

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown_pkg_readmes
    status: na
  - task: lint_markdown_docs
    status: na
  - task: lint_markdown
    status: na
  - task: lint_package_json
    status: na
  - task: lint_repl_help
    status: na
  - task: lint_javascript_src
    status: passed
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: na
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    status: na
  - task: lint_javascript_benchmarks
    status: na
  - task: lint_python
    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
    status: na
  - task: lint_c_examples
    status: na
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    status: na
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    status: na
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    status: na
  - task: lint_typescript_declarations
    status: passed
  - task: lint_typescript_tests
    status: passed
  - task: lint_license_headers
    status: passed
---
---
 .../stats/incr/nanwmean/docs/types/index.d.ts |  2 +-
 .../@stdlib/stats/incr/nanwmean/lib/main.js   | 47 ++-----------------
 2 files changed, 4 insertions(+), 45 deletions(-)

diff --git a/lib/node_modules/@stdlib/stats/incr/nanwmean/docs/types/index.d.ts b/lib/node_modules/@stdlib/stats/incr/nanwmean/docs/types/index.d.ts
index 7d2319a96aa0..4dc4ac1c2f56 100644
--- a/lib/node_modules/@stdlib/stats/incr/nanwmean/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/stats/incr/nanwmean/docs/types/index.d.ts
@@ -25,7 +25,7 @@
 *
 * ## Notes
 *
-* -   If provided `NaN` or a value which, when used in computations, results in `NaN`, the accumulated value is `NaN` for all future invocations.
+* -   If provided `NaN` values, accumulator returns current weighted arithmetic mean ignoring `NaN` value.
 *
 * @param x - value
 * @param w - weight
diff --git a/lib/node_modules/@stdlib/stats/incr/nanwmean/lib/main.js b/lib/node_modules/@stdlib/stats/incr/nanwmean/lib/main.js
index f37417640620..e4d0b537f5b7 100644
--- a/lib/node_modules/@stdlib/stats/incr/nanwmean/lib/main.js
+++ b/lib/node_modules/@stdlib/stats/incr/nanwmean/lib/main.js
@@ -27,48 +27,7 @@ var incrwmean = require( '@stdlib/stats/incr/wmean' );
 // MAIN //
 
 /**
-* Returns an accumulator function which incrementally computes a weighted arithmetic mean, ignoring `NaN` parameters.
-*
-* ## Method
-*
-* -   The weighted arithmetic mean is defined as
-*
-*     ```tex
-*     \mu = \frac{\sum_{i=0}^{n-1} w_i x_i}{\sum_{i=0}^{n-1} w_i}
-*     ```
-*
-*     where \\( w_i \\) are the weights.
-*
-* -   The weighted arithmetic mean is equivalent to the simple arithmetic mean when all weights are equal.
-*
-*     ```tex
-*     \begin{align*}
-*     \mu &= \frac{\sum_{i=0}^{n-1} w x_i}{\sum_{i=0}^{n-1} w} \\
-*         &= \frac{w\sum_{i=0}^{n-1} x_i}{nw} \\
-*         &= \frac{1}{n} \sum_{i=0}^{n-1}
-*     \end{align*}
-*     ```
-*
-* -   If the weights are different, then one can view weights either as sample frequencies or as a means to calculate probabilities where \\( p_i = w_i / \sum w_i \\).
-*
-* -   To derive an incremental formula for computing a weighted arithmetic mean, let
-*
-*     ```tex
-*     W_n = \sum_{i=1}^{n} w_i
-*     ```
-*
-* -   Accordingly,
-*
-*     ```tex
-*     \begin{align*}
-*     \mu_n &= \frac{1}{W_n} \sum_{i=1}^{n} w_i x_i \\
-*         &= \frac{1}{W_n} \biggl(w_n x_n + \sum_{i=1}^{n-1} w_i x_i \biggr) \\
-*         &= \frac{1}{W_n} (w_n x_n + W_{n-1} \mu_{n-1}) \\
-*         &= \frac{1}{W_n} (w_n x_n + (W_n - w_n) \mu_{n-1}) \\
-*         &= \frac{1}{W_n} (W_n \mu_{n-1} + w_n x_n - w_n\mu_{n-1}) \\
-*         &= \mu_{n-1} + \frac{w_n}{W_n} (x_n - \mu_{n-1})
-*     \end{align*}
-*     ```
+* Returns an accumulator function which incrementally computes a weighted arithmetic mean, ignoring `NaN` values.
 *
 * @returns {Function} accumulator function
 *
@@ -96,7 +55,7 @@ function incrnanwmean() {
 	return accumulator;
 
 	/**
-	* If provided arguments, the accumulator function returns an updated weighted mean. If not provided arguments, the accumulator function returns the current weighted mean.
+	* If provided arguments, the accumulator function returns an updated weighted mean. If not provided arguments or provided `NaN` values, the accumulator function returns the current weighted mean.
 	*
 	* @private
 	* @param {number} [x] - value
@@ -107,7 +66,7 @@ function incrnanwmean() {
 		if ( arguments.length === 0 ) {
 			return acc();
 		}
-		if ( isnan( x ) || isnan( w ) ) {
+		if ( arguments.length < 2 || isnan( x ) || isnan( w ) ) {
 			return acc();
 		}
 		return acc( x, w );

From 5390d0593687544d34e5efed3ecdc0d70f8b7dfd Mon Sep 17 00:00:00 2001
From: Arjan <arjanpingale@gmail.com>
Date: Thu, 23 Jul 2026 18:57:45 +0530
Subject: [PATCH 10/11] docs: add README.md

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown_pkg_readmes
    status: passed
  - task: lint_markdown_docs
    status: na
  - task: lint_markdown
    status: na
  - task: lint_package_json
    status: na
  - task: lint_repl_help
    status: na
  - task: lint_javascript_src
    status: na
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: na
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    status: na
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    status: na
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    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
    status: na
  - task: lint_c_examples
    status: na
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    status: na
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    status: na
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    status: na
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    status: passed
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---
---
 .../@stdlib/stats/incr/nanwmean/README.md     | 145 ++++++++++++++++++
 1 file changed, 145 insertions(+)
 create mode 100644 lib/node_modules/@stdlib/stats/incr/nanwmean/README.md

diff --git a/lib/node_modules/@stdlib/stats/incr/nanwmean/README.md b/lib/node_modules/@stdlib/stats/incr/nanwmean/README.md
new file mode 100644
index 000000000000..544f0633f63b
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/incr/nanwmean/README.md
@@ -0,0 +1,145 @@
+<!--
+
+@license Apache-2.0
+
+Copyright (c) 2026 The Stdlib Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+-->
+
+# incrnanwmean
+
+> Compute a [weighted arithmetic mean][weighted-arithmetic-mean] incrementally, ignoring `NaN` values.
+
+<section class="intro">
+
+The [weighted arithmetic mean][weighted-arithmetic-mean] is defined as
+
+<!-- <equation class="equation" label="eq:weighted_arithmetic_mean" align="center" raw="\bar{x} = \frac{\displaystyle\sum_{i=0}^{n-1} w_{i} x_{i}}{\displaystyle\sum_{i=0}^{n-1} w_{i}}" alt="Equation for the weighted arithmetic mean."> -->
+
+```math
+\bar{x} = \frac{\displaystyle\sum_{i=0}^{n-1} w_{i} x_{i}}{\displaystyle\sum_{i=0}^{n-1} w_{i}}
+```
+
+<!-- </equation> -->
+
+</section>
+
+<!-- /.intro -->
+
+<section class="usage">
+
+## Usage
+
+```javascript
+var incrnanwmean = require( '@stdlib/stats/incr/nanwmean' );
+```
+
+#### incrnanwmean()
+
+Returns an accumulator `function` which incrementally computes a [weighted arithmetic mean][weighted-arithmetic-mean], ignoring `NaN` values.
+
+```javascript
+var accumulator = incrnanwmean();
+```
+
+#### accumulator( \[x, w] )
+
+If provided an input value `x` and a weight `w`, the accumulator function returns an updated weighted mean. If not provided any input values or provided `NaN` values, the accumulator function returns the current mean.
+
+```javascript
+var accumulator = incrnanwmean();
+
+var mu = accumulator( 2.0, 1.0 );
+// returns 2.0
+
+mu = accumulator( 2.0, 0.5 );
+// returns 2.0
+
+mu = accumulator( NaN, 1.0 );
+// returns 2.0
+
+mu = accumulator( 3.0, 1.5 );
+// returns 2.5
+
+mu = accumulator();
+// returns 2.5
+```
+
+</section>
+
+<!-- /.usage -->
+
+<section class="notes">
+
+## Notes
+
+-   Input values are **not** type checked. If non-numeric inputs are possible, you are advised to type check and handle accordingly **before** passing the value to the accumulator function.
+
+</section>
+
+<!-- /.notes -->
+
+<section class="examples">
+
+## Examples
+
+<!-- eslint no-undef: "error" -->
+
+```javascript
+var randu = require( '@stdlib/random/base/randu' );
+var incrnanwmean = require( '@stdlib/stats/incr/nanwmean' );
+
+var accumulator;
+var v;
+var w;
+var i;
+
+// Initialize an accumulator:
+accumulator = incrnanwmean();
+
+// For each simulated datum, update the weighted mean...
+for ( i = 0; i < 100; i++ ) {
+    if ( randu() < 0.2 ) {
+        v = NaN;
+    } else {
+        v = randu() * 100.0;
+    }
+    w = randu() * 100.0;
+    accumulator( v, w );
+}
+console.log( accumulator() );
+```
+
+</section>
+
+<!-- /.examples -->
+
+<section class="related">
+
+* * *
+
+## See Also
+
+</section>
+
+<!-- /.related -->
+
+<section class="links">
+
+[weighted-arithmetic-mean]: https://en.wikipedia.org/wiki/Weighted_arithmetic_mean
+
+</section>
+
+<!-- /.links -->

From ace6315953a50c42b5f83ad18f32801ff0066133 Mon Sep 17 00:00:00 2001
From: Arjan <arjanpingale@gmail.com>
Date: Fri, 24 Jul 2026 10:39:56 +0530
Subject: [PATCH 11/11] fix: missing weight test, `NaN` args test

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown_pkg_readmes
    status: na
  - task: lint_markdown_docs
    status: na
  - task: lint_markdown
    status: na
  - task: lint_package_json
    status: na
  - task: lint_repl_help
    status: na
  - task: lint_javascript_src
    status: na
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: na
  - task: lint_javascript_tests
    status: passed
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    status: na
  - task: lint_python
    status: na
  - task: lint_r
    status: na
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    status: na
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    status: na
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    status: na
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    status: na
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    status: na
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    status: passed
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---
---
 .../@stdlib/stats/incr/nanwmean/test/test.js             | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/lib/node_modules/@stdlib/stats/incr/nanwmean/test/test.js b/lib/node_modules/@stdlib/stats/incr/nanwmean/test/test.js
index e5e330d22f39..5f2cf6b9b175 100644
--- a/lib/node_modules/@stdlib/stats/incr/nanwmean/test/test.js
+++ b/lib/node_modules/@stdlib/stats/incr/nanwmean/test/test.js
@@ -21,7 +21,6 @@
 // MODULES //
 
 var tape = require( 'tape' );
-var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var isAlmostSameValue = require( '@stdlib/assert/is-almost-same-value' );
 var incrnanwmean = require( './../lib' );
 
@@ -97,14 +96,14 @@ tape( 'the accumulator function incrementally computes a weighted arithmetic mea
 	t.end();
 });
 
-tape( 'if not provided a weight, the accumulator function returns `NaN`', function test( t ) {
+tape( 'if not provided a weight, the accumulator function returns currently accumulated weighted mean', function test( t ) {
 	var acc = incrnanwmean();
-	t.strictEqual( isnan( acc( 2.0 ) ), true, 'returns expected value' );
-	t.strictEqual( isnan( acc( 3.14 ) ), true, 'returns expected value' );
+	t.strictEqual( acc( 2.0 ), null, 'returns expected value, the initial accumulated value `null`' );
+	t.strictEqual( acc( 3.14 ), null, 'returns expected value, the initial accumulated value `null`' );
 	t.end();
 });
 
-tape( 'if provided `NaN` for either a value or a weight, the accumulator function returns `NaN`', function test( t ) {
+tape( 'if provided `NaN` for either a value or a weight, the accumulator function returns currently accumulated weighted mean', function test( t ) {
 	var acc = incrnanwmean();
 	t.strictEqual( acc( 2.0, NaN ), null, 'returns expected value' );
 	t.strictEqual( acc( 3.14, NaN ), null, 'returns expected value' );