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@stdlib/ndarray-base-nonsingleton-dimensions

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  • License Apache-2.0

Return the number of non-singleton dimensions.

Package Exports

  • @stdlib/ndarray-base-nonsingleton-dimensions

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (@stdlib/ndarray-base-nonsingleton-dimensions) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

Non-Singleton Dimensions

NPM version Build Status Coverage Status dependencies

Return the number of non-singleton dimensions.

Installation

npm install @stdlib/ndarray-base-nonsingleton-dimensions

Usage

var nonsingletonDimensions = require( '@stdlib/ndarray-base-nonsingleton-dimensions' );

nonsingletonDimensions( shape )

Returns number of non-singleton dimensions.

var n = nonsingletonDimensions( [ 3, 1, 3 ] );
// returns 2

Notes

  • A singleton dimension is a dimension whose size is equal to 1.

Examples

var discreteUniform = require( '@stdlib/random-base-discrete-uniform' );
var nonsingletonDimensions = require( '@stdlib/ndarray-base-nonsingleton-dimensions' );

var shape;
var n;
var i;

shape = [ 0, 0, 0 ];
for ( i = 0; i < 100; i++ ) {
    shape[ 0 ] = discreteUniform( 1, 5 );
    shape[ 1 ] = discreteUniform( 1, 5 );
    shape[ 2 ] = discreteUniform( 1, 5 );
    n = nonsingletonDimensions( shape );
    console.log( 'shape: %s. non-singleton dimensions: %d.', shape.join( 'x' ), n );
}

C APIs

Installation

npm install @stdlib/ndarray-base-nonsingleton-dimensions

Usage

#include "stdlib/ndarray/base/nonsingleton_dimensions.h"

stdlib_ndarray_nonsingleton_dimensions( ndims, *shape )

Returns the number of non-singleton dimensions.

int64_t ndims = 2;
int64_t shape[] = { 10, 1 };

int64_t n = stdlib_ndarray_nonsingleton_dimensions( ndims, shape );
// returns 1

The function accepts the following arguments:

  • ndims: [in] int64_t number of dimensions.
  • shape: [in] int64_t* array shape.
int64_t stdlib_ndarray_nonsingleton_dimensions( int64_t ndims, int64_t *shape );

Examples

#include "stdlib/ndarray/base/nonsingleton_dimensions.h"
#include <stdio.h>

int main() {
    int64_t shape[] = { 10, 3, 1, 1, 5 };

    int64_t n = stdlib_ndarray_nonsingleton_dimensions( 5, shape );
    printf( "shape: %llux%llux%llux%llux%llu. non-singleton dimensions: %llu\n", shape[ 0 ], shape[ 1 ], shape[ 2 ], shape[ 3 ], shape[ 4 ], n );
}

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.

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License

See LICENSE.

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