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Singleton Dimensions

Return the number of singleton dimensions.

Usage

To use in Observable,

singletonDimensions = require( 'https://cdn.jsdelivr.net/gh/stdlib-js/ndarray-base-singleton-dimensions@umd/browser.js' )

To vendor stdlib functionality and avoid installing dependency trees for Node.js, you can use the UMD server build:

var singletonDimensions = require( 'path/to/vendor/umd/ndarray-base-singleton-dimensions/index.js' )

To include the bundle in a webpage,

<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/ndarray-base-singleton-dimensions@umd/browser.js"></script>

If no recognized module system is present, access bundle contents via the global scope:

<script type="text/javascript">
(function () {
    window.singletonDimensions;
})();
</script>

singletonDimensions( shape )

Returns the number of singleton dimensions.

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

Notes

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

Examples

<!DOCTYPE html>
<html lang="en">
<body>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/random-base-discrete-uniform@umd/browser.js"></script>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/ndarray-base-singleton-dimensions@umd/browser.js"></script>
<script type="text/javascript">
(function () {

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 = singletonDimensions( shape );
    console.log( 'shape: %s. singleton dimensions: %d.', shape.join( 'x' ), n );
}

})();
</script>
</body>
</html>

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

License

See LICENSE.

Copyright

Copyright © 2016-2025. The Stdlib Authors.

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