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Author: stdlib-bot

CHANGELOG.md

@@ -10,6 +10,7 @@
 
 ### Features
 
+-   [`465a072`](https://github.com/stdlib-js/stdlib/commit/465a072ec949832752bd1aa2bdb7a3b165e90763) - add `ndarray/base/to-rotr90` [(#11747)](https://github.com/stdlib-js/stdlib/pull/11747)
 -   [`bb94409`](https://github.com/stdlib-js/stdlib/commit/bb944095335edac473c0c655d7300228ed856ca5) - add `rot90` to namespace
 -   [`902e522`](https://github.com/stdlib-js/stdlib/commit/902e522762ec678bc548d6a503d5a94046e708f1) - add `ndarray/rot90` [(#11705)](https://github.com/stdlib-js/stdlib/pull/11705)
 -   [`7c878a8`](https://github.com/stdlib-js/stdlib/commit/7c878a8c3103503f9a2f7782861e3b9ccfeb33e5) - add `rot180` to namespace
@@ -879,6 +880,7 @@ A total of 49 issues were closed in this release:
 
 <details>
 
+-   [`465a072`](https://github.com/stdlib-js/stdlib/commit/465a072ec949832752bd1aa2bdb7a3b165e90763) - **feat:** add `ndarray/base/to-rotr90` [(#11747)](https://github.com/stdlib-js/stdlib/pull/11747) _(by Muhammad Haris, Athan Reines)_
 -   [`1bb47ae`](https://github.com/stdlib-js/stdlib/commit/1bb47aee4385a96718afb38792d96ec5ec09e7da) - **docs:** fix comment _(by Athan Reines)_
 -   [`8c95fbf`](https://github.com/stdlib-js/stdlib/commit/8c95fbf9f000fba1e6a302792a33ac7394262a1c) - **docs:** fix comment _(by Athan Reines)_
 -   [`d1f33dc`](https://github.com/stdlib-js/stdlib/commit/d1f33dcee27be7cc4bfb9ddd977497ff21ee8be6) - **docs:** update ToC _(by Athan Reines)_

base/to-rotr90/README.md

@@ -0,0 +1,152 @@
+<!--
+
+@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.
+
+-->
+
+# toRotr90
+
+> Return a new ndarray where a matrix (or a stack of matrices) is rotated 90 degrees clockwise.
+
+<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->
+
+<section class="intro">
+
+</section>
+
+<!-- /.intro -->
+
+<!-- Package usage documentation. -->
+
+<section class="usage">
+
+## Usage
+
+```javascript
+var toRotr90 = require( '@stdlib/ndarray/base/to-rotr90' );
+```
+
+#### toRotr90( x, k )
+
+Returns a new ndarray where a matrix (or a stack of matrices) is rotated 90 degrees clockwise.
+
+```javascript
+var array = require( '@stdlib/ndarray/array' );
+
+var x = array( [ [ 1, 2 ], [ 3, 4 ] ] );
+// returns <ndarray>[ [ 1, 2 ], [ 3, 4 ] ]
+
+var y = toRotr90( x, 1 );
+// returns <ndarray>[ [ 3, 1 ], [ 4, 2 ] ]
+```
+
+The function accepts the following arguments:
+
+-   **x**: input ndarray.
+-   **k**: number of times to rotate by 90 degrees. Positive values rotate clockwise. Negative values rotate counterclockwise.
+
+</section>
+
+<!-- /.usage -->
+
+<!-- Package usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="notes">
+
+## Notes
+
+-   If `k > 0`, the function rotates the matrix clockwise.
+-   If `k < 0`, the function rotates the matrix counterclockwise.
+-   If provided an ndarray with fewer than two dimensions, the function does not perform a rotation and simply returns a copy of the input ndarray.
+
+</section>
+
+<!-- /.notes -->
+
+<!-- Package usage examples. -->
+
+<section class="examples">
+
+## Examples
+
+<!-- eslint no-undef: "error" -->
+
+```javascript
+var array = require( '@stdlib/ndarray/array' );
+var ndarray2array = require( '@stdlib/ndarray/to-array' );
+var toRotr90 = require( '@stdlib/ndarray/base/to-rotr90' );
+
+// Create a 2x3 matrix:
+var x = array( [ [ 1, 2, 3 ], [ 4, 5, 6 ] ] );
+
+// Rotate 90 degrees clockwise:
+var y = toRotr90( x, 1 );
+var arr = ndarray2array( y );
+// returns [ [ 4, 1 ], [ 5, 2 ], [ 6, 3 ] ]
+
+// Rotate 180 degrees:
+y = toRotr90( x, 2 );
+arr = ndarray2array( y );
+// returns [ [ 6, 5, 4 ], [ 3, 2, 1 ] ]
+
+// Rotate 270 degrees clockwise (equivalent to 90 degrees counterclockwise):
+y = toRotr90( x, 3 );
+arr = ndarray2array( y );
+// returns [ [ 3, 6 ], [ 2, 5 ], [ 1, 4 ] ]
+
+// Rotate 360 degrees (equivalent to no rotation):
+y = toRotr90( x, 4 );
+arr = ndarray2array( y );
+// returns [ [ 1, 2, 3 ], [ 4, 5, 6 ] ]
+
+// Rotate 90 degrees counterclockwise (equivalent to 270 degrees clockwise):
+y = toRotr90( x, -1 );
+arr = ndarray2array( y );
+// returns [ [ 3, 6 ], [ 2, 5 ], [ 1, 4 ] ]
+```
+
+</section>
+
+<!-- /.examples -->
+
+<!-- Section to include cited references. If references are included, add a horizontal rule *before* the section. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="references">
+
+</section>
+
+<!-- /.references -->
+
+<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->
+
+<section class="related">
+
+</section>
+
+<!-- /.related -->
+
+<!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="links">
+
+<!-- <related-links> -->
+
+<!-- </related-links> -->
+
+</section>
+
+<!-- /.links -->