@stdlib/math-base-special-kronecker-delta
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    0.0.7 • Public • Published

    Kronecker Delta

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    Evaluate the Kronecker delta.

    The Kronecker delta is defined as

    Kronecker delta.

    Installation

    npm install @stdlib/math-base-special-kronecker-delta

    Usage

    var kroneckerDelta = require( '@stdlib/math-base-special-kronecker-delta' );

    kroneckerDelta( i, j )

    Evaluates the Kronecker delta.

    var v = kroneckerDelta( 3.14, 3.14 );
    // returns 1.0
    
    v = kroneckerDelta( 3.14, 0.0 );
    // returns 0.0
    
    v = kroneckerDelta( NaN, 3.14 );
    // returns NaN
    
    v = kroneckerDelta( 3.14, NaN );
    // returns NaN
    
    v = kroneckerDelta( NaN, NaN );
    // returns NaN

    Examples

    var linspace = require( '@stdlib/array-linspace' );
    var kroneckerDelta = require( '@stdlib/math-base-special-kronecker-delta' );
    
    var x = linspace( -1.0, 1.0, 101 );
    var i;
    
    for ( i = 0; i < x.length; i++ ) {
        console.log( 'kronecker(%d,%d) = %d', x[ i ], 0.0, kroneckerDelta( x[ i ], 0.0 ) );
    }

    C APIs

    Installation

    npm install @stdlib/math-base-special-kronecker-delta

    Usage

    #include "stdlib/math/base/special/kronecker_delta.h

    stdlib_base_kronecker_delta( i, j )

    Evaluates the Kronecker delta.

    double v = stdlib_base_kronecker_delta( 3.0, 3.0 );
    // returns 1.0

    The function accepts the following arguments:

    • i: [in] double input value.
    • j: [in] double input value.
    double stdlib_base_kronecker_delta( const double i, const double j );

    Examples

    #include "stdlib/math/base/special/kronecker_delta.h"
    #include <stdio.h>
    
    int main() {
        double x[] = { 3.0, 4.0, 5.0, 5.0 };
    
        double y;
        int i;
        for ( i = 0; i < 4; i += 2 ) {
            y = stdlib_base_kronecker_delta( x[ i ], x[ i+1 ] );
            printf( "kronecker_delta(%lf, %lf) = %lf\n", x[ i ], x[ i+1 ], y );
        }
    }

    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.

    Copyright

    Copyright © 2016-2021. The Stdlib Authors.

    Install

    npm i @stdlib/math-base-special-kronecker-delta

    Homepage

    stdlib.io

    DownloadsWeekly Downloads

    49

    Version

    0.0.7

    License

    Apache-2.0

    Unpacked Size

    58.3 kB

    Total Files

    17

    Last publish

    Collaborators

    • stdlib-bot
    • kgryte
    • planeshifter
    • rreusser