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exp2

README.md

exp2

Base 2 exponential function.

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 uniform = require( '@stdlib/random/array/uniform' );
var logEachMap = require( '@stdlib/console/log-each-map' );
var exp2 = require( '@stdlib/math/base/special/exp2' );

var opts = {
    'dtype': 'float64'
};
var x = uniform( 100, -50.0, 50.0, opts );

logEachMap( '2^%0.4f = %0.4f', x, exp2 );

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 );
    }
}

See Also