README
pdifff
Return the positive difference between
x
andy
.
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() {
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.
Community
License
See LICENSE.
Copyright
Copyright © 2016-2022. The Stdlib Authors.