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secdf

README.md

secdf

Compute the secant of a single-precision floating-point number (in degrees).

Usage

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

secdf( x )

Computes the secant of a single-precision floating-point number (in degrees).

var v = secdf( 30.0 );
// returns ~1.15

v = secdf( 45.0 );
// returns ~1.41

v = secdf( 60.0 );
// returns ~2.0

v = secdf( 90.0 );
// returns Infinity

v = secdf( 0.0 );
// returns 1.0

v = secdf( NaN );
// returns NaN

Examples

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

var opts = {
    'dtype': 'float32'
};
var x = uniform( 100, -180.0, 180.0, opts );

logEachMap( 'secdf(%0.4f) = %0.4f', x, secdf );

C APIs

Usage

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

stdlib_base_secdf( x )

Computes the secant of a single-precision floating-point number (in degrees).

float out = stdlib_base_secdf( 30.0f );
// returns ~1.15f

out = stdlib_base_secdf( 45.0f );
// returns ~1.41f

The function accepts the following arguments:

  • x: [in] float input value.
float stdlib_base_secdf( const float x );

Examples

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

int main( void ) {
    const float x[] = { 0.0f, 30.0f, 45.0f, 60.0f, 90.0f };

    float y;
    int i;
    for ( i = 0; i < 5; i++ ) {
        y = stdlib_base_secdf( x[ i ] );
        printf( "secdf(%f) = %f\n", x[ i ], y );
    }
}