realf

Return the real component of a single-precision complex floating-point number.

Usage

var realf = require( '@stdlib/complex/realf' );

realf( z )

Returns the real component of a single-precision complex floating-point number.

var Complex64 = require( '@stdlib/complex/float32' );

var z = new Complex64( 5.0, 3.0 );
var re = realf( z );
// returns 5.0

Examples

var Complex64 = require( '@stdlib/complex/float32' );
var randu = require( '@stdlib/random/base/randu' );
var round = require( '@stdlib/math/base/special/round' );
var realf = require( '@stdlib/complex/realf' );

var re;
var im;
var z;
var i;

for ( i = 0; i < 100; i++ ) {
    re = round( (randu()*100.0) - 50.0 );
    im = round( (randu()*50.0) - 25.0 );
    z = new Complex64( re, im );
    console.log( 'realf(%s) = %d', z.toString(), realf( z ) );
}

C APIs

Usage

#include "stdlib/complex/realf.h"

stdlib_realf( z )

Returns the real component of a single-precision complex floating-point number.

#include "stdlib/complex/float32.h"

stdlib_complex64_t z = stdlib_complex64( 5.0f, 2.0f );

// ...

float re = stdlib_realf( z );
// returns 5.0f

The function accepts the following arguments:

z: [in] stdlib_complex64_t single-precision complex floating-point number.

float stdlib_realf( const stdlib_complex64_t z );

Examples

#include "stdlib/complex/realf.h"
#include "stdlib/complex/float32.h"
#include <stdio.h>

int main() {
    stdlib_complex64_t x[] = {
        stdlib_complex64( 5.0f, 2.0f ),
        stdlib_complex64( -2.0f, 1.0f ),
        stdlib_complex64( 0.0f, -0.0f ),
        stdlib_complex64( 0.0f/0.0f, 0.0f/0.0f )
    };

    int i;
    for ( i = 0; i < 4; i++ ) {
        printf( "realf(v) = %f\n", stdlib_realf( x[ i ] ) );
    }
}