csub

Subtract two double-precision complex floating-point numbers.

Usage

var csub = require( '@stdlib/math/base/ops/csub' );

csub( z1, z2 )

Subtracts two double-precision complex floating-point numbers.

var Complex128 = require( '@stdlib/complex/float64' );
var real = require( '@stdlib/complex/real' );
var imag = require( '@stdlib/complex/imag' );

var z1 = new Complex128( 5.0, 3.0 );
var z2 = new Complex128( -2.0, 1.0 );

var v = csub( z1, z2 );
// returns <Complex128>

var re = real( v );
// returns 7.0

var im = imag( v );
// returns 2.0

Examples

var Complex128 = require( '@stdlib/complex/float64' );
var discreteUniform = require( '@stdlib/random/base/discrete-uniform' ).factory;
var csub = require( '@stdlib/math/base/ops/csub' );

var rand;
var z1;
var z2;
var z3;
var i;

rand = discreteUniform( -50, 50 );
for ( i = 0; i < 100; i++ ) {
    z1 = new Complex128( rand(), rand() );
    z2 = new Complex128( rand(), rand() );
    z3 = csub( z1, z2 );
    console.log( '(%s) - (%s) = %s', z1.toString(), z2.toString(), z3.toString() );
}

C APIs

Usage

#include "stdlib/math/base/ops/csub.h"

stdlib_base_csub( z1, z2 )

Subtracts two double-precision complex floating-point numbers.

#include <complex.h>

double complex z1 = 5.0 + 3.0*I;
double complex z2 = -2.0 + 1.0*I;

double complex out = stdlib_base_csub( z1, z2 );
// returns 7.0+2.0*I

The function accepts the following arguments:

z1: [in] double complex input value.
z2: [in] double complex input value.

double complex stdlib_base_csub( const double complex z1, const double complex z2 );

Examples

#include "stdlib/math/base/ops/csub.h"
#include <stdio.h>
#include <complex.h>

int main() {
    double complex x[] = { 3.14+1.5*I, -3.14-1.5*I, 0.0+0.0*I, 0.0/0.0+0.0/0.0*I };

    double complex v;
    double complex y;
    int i;
    for ( i = 0; i < 4; i++ ) {
        v = x[ i ];
        y = stdlib_base_csub( v, v );
        printf( "z = %lf + %lfi\ncsub(z, z) = %lf + %lfi\n", creal( v ), cimag( v ), creal( y ), cimag( y ) );
    }
}