@stdlib/math-base-special-inv
v0.2.1
Published
Compute the multiplicative inverse of a double-precision floating-point number.
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inv
Compute the multiplicative inverse of a double-precision floating-point number.
The multiplicative inverse (or reciprocal) is defined as
Installation
npm install @stdlib/math-base-special-inv
Usage
var inv = require( '@stdlib/math-base-special-inv' );
inv( x )
Computes the multiplicative inverse of a double-precision floating-point number x
.
var v = inv( -1.0 );
// returns -1.0
v = inv( 2.0 );
// returns 0.5
v = inv( 0.0 );
// returns Infinity
v = inv( -0.0 );
// returns -Infinity
v = inv( NaN );
// returns NaN
Examples
var randu = require( '@stdlib/random-base-randu' );
var round = require( '@stdlib/math-base-special-round' );
var inv = require( '@stdlib/math-base-special-inv' );
var x;
var i;
for ( i = 0; i < 100; i++ ) {
x = round( randu()*100.0 ) - 50.0;
console.log( 'inv(%d) = %d', x, inv( x ) );
}
C APIs
Usage
#include "stdlib/math/base/special/inv.h"
stdlib_base_inv( x )
Computes the multiplicative inverse of a double-precision floating-point number.
double y = stdlib_base_inv( 2.0 );
// returns 0.5
The function accepts the following arguments:
- x:
[in] double
input value.
double stdlib_base_inv( const double x );
Examples
#include "stdlib/math/base/special/inv.h"
#include <stdio.h>
int main( void ) {
const double x[] = { 3.0, 4.0, 5.0, 12.0 };
double y;
int i;
for ( i = 0; i < 4; i++ ) {
y = stdlib_base_inv( x[ i ] );
printf( "inv(%lf) = %lf\n", x[ i ], y );
}
}
See Also
@stdlib/math-base/special/pow
: exponential function.
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 © 2016-2024. The Stdlib Authors.