stdlib-js
<summary>
About stdlib...
</summary>
We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.
The library is fully decomposable, being architected in such a way that you can swap out and mix and match APIs and functionality to cater to your exact preferences and use cases.
When you use stdlib, you can be absolutely certain that you are using the most thorough, rigorous, well-written, studied, documented, tested, measured, and high-quality code out there.
To join us in bringing numerical computing to the web, get started by checking us out on GitHub, and please consider financially supporting stdlib. We greatly appreciate your continued support!
Exponential Function
[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url]
[Exponential function][exponential-function].
b is the base and x is the exponent.
bash
npm install @stdlib/math-base-special-pow
javascript
var pow = require( '@stdlib/math-base-special-pow' );
#### pow( base, exponent )
Evaluates the [exponential function][exponential-function].
javascript
var v = pow( 2.0, 3.0 );
// returns 8.0
v = pow( 4.0, 0.5 );
// returns 2.0
v = pow( 100.0, 0.0 );
// returns 1.0
v = pow( 3.141592653589793, 5.0 );
// returns ~306.0197
v = pow( 3.141592653589793, -0.2 );
// returns ~0.7954
v = pow( NaN, 3.0 );
// returns NaN
v = pow( 5.0, NaN );
// returns NaN
v = pow( NaN, NaN );
// returns NaN
javascript
var randu = require( '@stdlib/random-base-randu' );
var round = require( '@stdlib/math-base-special-round' );
var pow = require( '@stdlib/math-base-special-pow' );
var b;
var x;
var i;
for ( i = 0; i < 100; i++ ) {
b = round( randu()*10.0 );
x = round( randu()*10.0 ) - 5.0;
console.log( '%d^%d = %d', b, x, pow( b, x ) );
}
c
#include "stdlib/math/base/special/pow.h"
#### stdlib_base_pow( base, exponent )
Evaluates the exponential function.
c
double out = stdlib_base_pow( 3.141592653589793, 5.0 );
// returns ~306.0197
out = stdlib_base_pow( 4.0, 0.5 );
// returns 2.0
The function accepts the following arguments:
- base: [in] double base.
- exponent: [in] double exponent.
c
double stdlib_base_pow( const double base, const double exponent );
c
#include "stdlib/math/base/special/pow.h"
#include <stdlib.h>
#include <stdio.h>
int main( void ) {
double out;
double b;
double x;
int i;
for ( i = 0; i < 100; i++ ) {
b = ( ( (double)rand() / (double)RAND_MAX ) * 10.0 );
x = ( ( (double)rand() / (double)RAND_MAX ) * 10.0 ) - 5.0;
out = stdlib_base_pow( b, x );
printf( "pow(%lf, %lf) = %lf\n", b, x, out );
}
}
@stdlib/math-base/special/exp][@stdlib/math/base/special/exp]: natural exponential function.
- [@stdlib/math-base/special/powm1][@stdlib/math/base/special/powm1]: evaluate bˣ - 1.
