@stdlib/math-base-special-pdifff NPM

pdifff

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Return the positive difference between x and y.

Installation

npm install @stdlib/math-base-special-pdifff

Usage

var pdifff = require( '@stdlib/math-base-special-pdifff' );

pdifff( x, y )

Returns the positive difference between x and y if x < y; otherwise, returns 0.

var v = pdifff( 4.15, 3.15 );
// returns 1.0

v = pdifff( 3.14, 4.2 );
// returns +0.0

v = pdifff( -0.0, +0.0 );
// returns +0.0

If any argument is NaN, the function returns NaN.

var v = pdifff( 4.2, NaN );
// returns NaN

v = pdifff( NaN, 3.14 );
// returns NaN

v = pdifff( NaN, NaN );
// returns NaN

Notes

This function is the equivalent of fdimf in the C/C++ standard library.

Examples

var minstd = require( '@stdlib/random-base-minstd-shuffle' );
var pdifff = require( '@stdlib/math-base-special-pdifff' );

var x;
var y;
var v;
var i;

for ( i = 0; i < 100; i++ ) {
    x = minstd();
    y = minstd();
    v = pdifff( x, y );
    console.log( 'pdifff(%d,%d) = %d', x, y, v );
}

C APIs

Usage

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

stdlib_base_pdifff( x, y )

Returns the positive difference between x and y (single-precision).

float v = stdlib_base_pdifff( 4.0f, 3.0f );
// returns 1.0f

The function accepts the following arguments:

x: [in] float input value.
y: [in] float input value.

float stdlib_base_pdifff( const float x, const float y );

Examples

#include "stdlib/math/base/special/pdifff.h"
#include <stdio.h>

int main( void ) {
    const float x[] = { 3.0f, 4.0f, 6.0f, 5.0f };

    float y;
    int i;
    for ( i = 0; i < 4; i += 2 ) {
        y = stdlib_base_pdifff( x[ i ], x[ i+1 ] );
        printf( "pdifff(%f, %f) = %f\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.