tanh

Compute the hyperbolic tangent of a double-precision floating-point number.

Usage

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

tanh( x )

Computes the hyperbolic tangent of double-precision floating-point number x.

var v = tanh( 0.0 );
// returns 0.0

v = tanh( -0.0 );
// returns -0.0

v = tanh( 2.0 );
// returns ~0.964

v = tanh( -2.0 );
// returns ~-0.964

v = tanh( NaN );
// returns NaN

Examples

var linspace = require( '@stdlib/array/base/linspace' );
var tanh = require( '@stdlib/math/base/special/tanh' );

var x = linspace( -4.0, 4.0, 100 );

var i;
for ( i = 0; i < x.length; i++ ) {
    console.log( tanh( x[ i ] ) );
}

C APIs

Usage

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

stdlib_base_tanh( x )

Computes the hyperbolic tangent of double-precision floating-point number x.

double out = stdlib_base_tanh( 2.0 );
// returns ~0.964

out = stdlib_base_tanh( -2.0 );
// returns ~-0.964

The function accepts the following arguments:

x: [in] double input value.

double stdlib_base_tanh( const double x );

Examples

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

int main( void ) {
    const double x[] = { -4.0, -3.11, -2.22, -1.33, -0.44, 0.44, 1.33, 2.22, 3.11, 4.0 };
    
    double v;
    int i;
    for ( i = 0; i < 10; i++ ) {
        v = stdlib_base_tanh( x[ i ] );
        printf( "tanh(%lf) = %lf\n", x[ i ], v );
    }
}