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stdlib/lib/node_modules/@stdlib/complex/float32/real at develop · stdlib-js/stdlib

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

Usage

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

real( z )

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

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

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

Examples

var Complex64 = require( '@stdlib/complex/float32/ctor' );
var discreteUniform = require( '@stdlib/random/base/discrete-uniform' );
var filledarrayBy = require( '@stdlib/array/filled-by' );
var real = require( '@stdlib/complex/float32/real' );

function random() {
    return new Complex64( discreteUniform( -10, 10 ), discreteUniform( -10, 10 ) );
}

// Generate an array of random complex numbers:
var x = filledarrayBy( 100, 'complex64', random );
// returns <Complex64Array>

// Retrieve the real component of each complex number...
var z;
var i;
for ( i = 0; i < x.length; i++ ) {
    z = x.get( i );
    console.log( 'real(%s) = %d', z.toString(), real( z ) );
}

C APIs

Usage

#include "stdlib/complex/float32/real.h"

stdlib_complex64_real( z )

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

#include "stdlib/complex/float32/ctor.h"

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

// ...

float re = stdlib_complex64_real( z );
// returns 5.0f

The function accepts the following arguments:

  • z: [in] stdlib_complex64_t single-precision complex floating-point number.
float stdlib_complex64_real( const stdlib_complex64_t z );

Examples

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

int main( void ) {
    const 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( "real(v) = %f\n", stdlib_complex64_real( x[ i ] ) );
    }
}

See Also