@stdlib/math-base-special-exp2

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exp2

Base 2 exponential function.

Installation

npm install @stdlib/math-base-special-exp2

Usage

var exp2 = require( '@stdlib/math-base-special-exp2' );

exp2( x )

Evaluates the base 2 exponential function.

var v = exp2( 3.0 );
// returns 8.0

v = exp2( -9.0 );
// returns ~0.002

v = exp2( 0.0 );
// returns 1.0

v = exp2( NaN );
// returns NaN

Examples

var randu = require( '@stdlib/random-base-randu' );
var exp2 = require( '@stdlib/math-base-special-exp2' );

var x;
var i;

for ( i = 0; i < 100; i++ ) {
    x = (randu()*100.0) - 50.0;
    console.log( '2^%d = %d', x, exp2( x ) );
}

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C APIs

Usage

#include "stdlib/math/base/special/exp2.h"

stdlib_base_exp2( x )

Evaluates the base 2 exponential function.

double out = stdlib_base_exp2( 3.0 );
// returns 8.0

out = stdlib_base_exp2( -9.0 );
// returns ~0.002

The function accepts the following arguments:

• x: [in] double input value.

double stdlib_base_exp2( const double x );

Examples

#include "stdlib/math/base/special/exp2.h"
#include <stdlib.h>
#include <stdio.h>

int main( void ) {
    double x;
    double v;
    int i;

    for ( i = 0; i < 100; i++ ) {
        x = ( ( (double)rand() / (double)RAND_MAX ) * 100.0 ) - 50.0;
        v = stdlib_base_exp2( x );
        printf( "2^%lf = %lf\n", x, v );
    }
}

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See Also

• @stdlib/math-base/special/exp: natural exponential function.
• @stdlib/math-base/special/exp10: base 10 exponential function.
• @stdlib/math-base/special/log2: binary logarithm (base 2).

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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

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Copyright

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