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Return a list of non-reduced dimensions in an un-normalized
MultiSliceobject.
In a multi-axis indexing expression (e.g., '1,:,2,:,0:10:1'), a non-reduced dimension corresponds to a dimension which is retained in the slice result. Only integer indexing expressions (e.g., only the first and third dimensions in '1,:,2,:,0:10:1') result in dimension reduction; slices always retain respective dimensions, even if a slice is empty or only selects a single element.
npm install @stdlib/slice-base-nonreduced-dimensionsAlternatively,
- To load the package in a website via a
scripttag without installation and bundlers, use the ES Module available on theesmbranch (see README). - If you are using Deno, visit the
denobranch (see README for usage intructions). - For use in Observable, or in browser/node environments, use the Universal Module Definition (UMD) build available on the
umdbranch (see README).
The branches.md file summarizes the available branches and displays a diagram illustrating their relationships.
To view installation and usage instructions specific to each branch build, be sure to explicitly navigate to the respective README files on each branch, as linked to above.
var nonreducedDimensions = require( '@stdlib/slice-base-nonreduced-dimensions' );Returns a list of non-reduced dimensions in an un-normalized MultiSlice object.
var MultiSlice = require( '@stdlib/slice-multi' );
var Slice = require( '@stdlib/slice-ctor' );
var s = new MultiSlice( 1, null, 2, void 0, new Slice( 0, 10, 1 ) );
// returns <MultiSlice>
var indices = nonreducedDimensions( s );
// returns [ 1, 3, 4 ]var S = require( '@stdlib/slice-ctor' );
var MultiSlice = require( '@stdlib/slice-multi' );
var nonreducedDimensions = require( '@stdlib/slice-base-nonreduced-dimensions' );
var s = new MultiSlice( null, S(), -1 );
var out = nonreducedDimensions( s );
console.log( '%s => [%s]', s.toString(), out.join( ',' ) );
s = new MultiSlice( null );
out = nonreducedDimensions( s );
console.log( '%s => [%s]', s.toString(), out.join( ',' ) );
s = new MultiSlice( S( -1, null, -1 ), 3 );
out = nonreducedDimensions( s );
console.log( '%s => [%s]', s.toString(), out.join( ',' ) );
s = new MultiSlice( 2, S( -10, -2, 2 ), 3, null );
out = nonreducedDimensions( s );
console.log( '%s => [%s]', s.toString(), out.join( ',' ) );
s = new MultiSlice( S( 1, 20, 2 ), S( null, null, -1 ) );
out = nonreducedDimensions( s );
console.log( '%s => [%s]', s.toString(), out.join( ',' ) );@stdlib/slice-base/length: compute the number of elements in a normalized slice.@stdlib/slice-base/reduced-dimensions: return a list of reduced dimensions in an un-normalized multi-slice.@stdlib/slice-base/shape: compute the shape of a normalized multi-slice.
This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.
For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.
See LICENSE.
Copyright © 2016-2024. The Stdlib Authors.
