Auto-generated commit

base/slice-dimension-from/lib/index.js

@@ -42,7 +42,7 @@
 * var arr = ndarray2array( x );
 * // returns [ [ 1.0, 2.0 ], [ 3.0, 4.0 ], [ 5.0, 6.0 ] ]
 *
-* var y = sliceDimensionFrom( x, 0, 2, false, false );
+* var y = sliceDimensionFrom( x, 0, 1, false, false );
 * // returns <ndarray>
 *
 * sh = y.shape;

base/slice-dimension-from/test/test.js

@@ -187,7 +187,7 @@ tape( 'in non-strict mode, the function returns an empty array when a starting i
 	t.end();
 });
 
-tape( 'the function returns an empty array when a starting index is the one more than the last index along a dimension', function test( t ) {
+tape( 'in non-strict mode, the function returns an empty array when a starting index is the one more than the last index along a dimension', function test( t ) {
 	var actual;
 	var values;
 	var start;

lib/index.js

@@ -342,6 +342,15 @@ setReadOnly( ns, 'ndsliceAssign', require( './../slice-assign' ) );
 */
 setReadOnly( ns, 'ndsliceDimension', require( './../slice-dimension' ) );
 
+/**
+* @name ndsliceDimensionFrom
+* @memberof ns
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/ndarray/slice-dimension-from}
+*/
+setReadOnly( ns, 'ndsliceDimensionFrom', require( './../slice-dimension-from' ) );
+
 /**
 * @name ndsliceDimensionTo
 * @memberof ns

slice-dimension-from/README.md

@@ -0,0 +1,202 @@
+<!--
+
+@license Apache-2.0
+
+Copyright (c) 2023 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.
+
+-->
+
+# sliceDimensionFrom
+
+> Return a read-only shifted view of an input [`ndarray`][@stdlib/ndarray/ctor] along a specified dimension.
+
+<!-- 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 sliceDimensionFrom = require( '@stdlib/ndarray/slice-dimension-from' );
+```
+
+#### sliceDimensionFrom( x, dim, start\[, options] )
+
+Returns a **read-only** shifted view of an input [`ndarray`][@stdlib/ndarray/ctor] along a specified dimension.
+
+```javascript
+var ndarray = require( '@stdlib/ndarray/ctor' );
+var ndarray2array = require( '@stdlib/ndarray/to-array' );
+
+var buffer = [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 ];
+var shape = [ 3, 2 ];
+var strides = [ 2, 1 ];
+var offset = 0;
+
+var x = ndarray( 'generic', buffer, shape, strides, offset, 'row-major' );
+// returns <ndarray>
+
+var sh = x.shape;
+// returns [ 3, 2 ]
+
+var arr = ndarray2array( x );
+// returns [ [ 1.0, 2.0 ], [ 3.0, 4.0 ], [ 5.0, 6.0 ] ]
+
+var y = sliceDimensionFrom( x, 0, 1 );
+// returns <ndarray>
+
+sh = y.shape;
+// returns [ 2, 2 ]
+
+arr = ndarray2array( y );
+// returns [ [ 3.0, 4.0 ], [ 5.0, 6.0 ] ]
+```
+
+The function accepts the following arguments:
+
+-   **x**: input [`ndarray`][@stdlib/ndarray/ctor].
+-   **dim**: index of dimension along which to slice. If provided an integer less than zero, the dimension index is resolved relative to the last dimension, with the last dimension corresponding to the value `-1`.
+-   **start**: starting index (inclusive). If provided an integer less than zero, the corresponding element along the specified dimension is resolved relative to the last element along that dimension. For negative integers, the last element corresponds to the value `-1`.
+-   **options**: function options.
+
+The function supports the following `options`:
+
+-   **strict**: boolean indicating whether to enforce strict bounds checking.
+
+By default, the function throws an error when provided a starting index which exceeds array bounds. To return an empty array when a starting index exceeds array bounds, set the `strict` option to `false`.
+
+```javascript
+var ndarray = require( '@stdlib/ndarray/ctor' );
+var ndarray2array = require( '@stdlib/ndarray/to-array' );
+
+var buffer = [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 ];
+var shape = [ 3, 2 ];
+var strides = [ 2, 1 ];
+var offset = 0;
+
+var x = ndarray( 'generic', buffer, shape, strides, offset, 'row-major' );
+// returns <ndarray>
+
+var sh = x.shape;
+// returns [ 3, 2 ]
+
+var arr = ndarray2array( x );
+// returns [ [ 1.0, 2.0 ], [ 3.0, 4.0 ], [ 5.0, 6.0 ] ]
+
+var y = sliceDimensionFrom( x, 1, 20, {
+    'strict': false
+});
+// returns <ndarray>
+
+sh = y.shape;
+// returns [ 3, 0 ]
+
+arr = ndarray2array( y );
+// returns []
+```
+
+</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">
+
+</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 zeroTo = require( '@stdlib/array/base/zero-to' );
+var sliceDimensionFrom = require( '@stdlib/ndarray/slice-dimension-from' );
+
+// Create a linear ndarray buffer:
+var buf = zeroTo( 27 );
+
+// Create an ndarray:
+var x = array( buf, {
+    'shape': [ 3, 3, 3 ]
+});
+
+// Get the last two rows of each matrix:
+var y1 = sliceDimensionFrom( x, 1, 1 );
+// returns <ndarray>
+
+var a1 = ndarray2array( y1 );
+// returns [ [ [ 3, 4, 5 ], [ 6, 7, 8 ] ], [ [ 12, 13, 14 ], [ 15, 16, 17 ] ], [ [ 21, 22, 23 ], [ 24, 25, 26 ] ] ]
+
+// Get the last columns of each matrix:
+var y2 = sliceDimensionFrom( x, 2, 1 );
+// returns <ndarray>
+
+var a2 = ndarray2array( y2 );
+// returns [ [ [ 1, 2 ], [ 4, 5 ], [ 7, 8 ] ], [ [ 10, 11 ], [ 13, 14 ], [ 16, 17 ] ], [ [ 19, 20 ], [ 22, 23 ], [ 25, 26 ] ] ]
+
+// Get the last two matrices:
+var y3 = sliceDimensionFrom( x, 0, 1 );
+// returns <ndarray>
+
+var a3 = ndarray2array( y3 );
+// returns [ [ [ 9, 10, 11 ], [ 12, 13, 14 ], [ 15, 16, 17 ] ], [ [ 18, 19, 20 ], [ 21, 22, 23 ], [ 24, 25, 26 ] ] ]
+```
+
+</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">
+
+[@stdlib/ndarray/ctor]: https://github.com/stdlib-js/ndarray/tree/main/ctor
+
+</section>
+
+<!-- /.links -->