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sliceShape

Compute the shape of a normalized multi-slice.

Installation

npm install @stdlib/slice-base-shape

Alternatively,

• To load the package in a website via a script tag without installation and bundlers, use the ES Module available on the esm branch (see README).
• If you are using Deno, visit the deno branch (see README for usage intructions).
• For use in Observable, or in browser/node environments, use the Universal Module Definition (UMD) build available on the umd branch (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.

Usage

var sliceShape = require( '@stdlib/slice-base-shape' );

sliceShape( slice )

Returns the shape of a normalized multi-slice.

var S = require( '@stdlib/slice-ctor' );
var MultiSlice = require( '@stdlib/slice-multi' );
var normalizeMultiSlice = require( '@stdlib/slice-base-normalize-multi-slice' );

var s = new MultiSlice( S( -4, null, -1 ), S( 2, 10, 1 ) );
// returns <MultiSlice>

s = normalizeMultiSlice( s, [ 10, 10 ], false );
// returns <MultiSlice>

var sh = sliceShape( s );
// returns [ 7, 8 ]

Examples

var S = require( '@stdlib/slice-ctor' );
var MultiSlice = require( '@stdlib/slice-multi' );
var normalizeMultiSlice = require( '@stdlib/slice-base-normalize-multi-slice' );
var sliceShape = require( '@stdlib/slice-base-shape' );

var s1 = new MultiSlice( S( 3, null, -1 ), S( 3, 7, 1 ) );
var s2 = normalizeMultiSlice( s1, [ 10, 10 ], false );
var sh = sliceShape( s2 );
console.log( '%s => %s', s1.toString(), s2.toString() );
console.log( '[ %s ]', sh.join( ', ' ) );
// => '[ 4, 4 ]'

s1 = new MultiSlice( null, S( -1, -8, -2 ) );
s2 = normalizeMultiSlice( s1, [ 11, 12 ], false );
sh = sliceShape( s2 );
console.log( '%s => %s', s1.toString(), s2.toString() );
console.log( '[ %s ]', sh.join( ', ' ) );
// => '[ 11, 4 ]'

s1 = new MultiSlice( S( null, null, 1 ), null );
s2 = normalizeMultiSlice( s1, [ 11, 12 ], false );
sh = sliceShape( s2 );
console.log( '%s => %s', s1.toString(), s2.toString() );
console.log( '[ %s ]', sh.join( ', ' ) );
// => '[ 11, 12 ]'

s1 = new MultiSlice( S( 5, 5, 1 ), null );
s2 = normalizeMultiSlice( s1, [ 11, 12 ], false );
sh = sliceShape( s2 );
console.log( '%s => %s', s1.toString(), s2.toString() );
console.log( '[ %s ]', sh.join( ', ' ) );
// => '[ 0, 12 ]'

s1 = new MultiSlice( S( 5, 5, 1 ), S( 3, 3, 1 ) );
s2 = normalizeMultiSlice( s1, [ 10, 10 ], false );
sh = sliceShape( s2 );
console.log( '%s => %s', s1.toString(), s2.toString() );
console.log( '[ %s ]', sh.join( ', ' ) );
// => '[ 0, 0 ]'

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See Also

• @stdlib/slice-base/length: compute the number of elements in a normalized slice.
• @stdlib/slice-base/nonreduced-dimensions: return a list of non-reduced dimensions in an un-normalized multi-slice.
• @stdlib/slice-base/reduced-dimensions: return a list of reduced dimensions in an un-normalized multi-slice.

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Notice

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.

Community

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License

See LICENSE.

Copyright

Copyright © 2016-2024. The Stdlib Authors.