Skip to content

sub

Directory actions

More options

Directory actions

More options

Latest commit

 

History

History
 
 

sub

README.md

csubf

Subtract two single-precision complex floating-point numbers.

Usage

var csubf = require( '@stdlib/complex/float32/base/sub' );

csubf( z1, z2 )

Subtracts two single-precision complex floating-point numbers.

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

var z1 = new Complex64( 5.0, 3.0 );
var z2 = new Complex64( -2.0, 1.0 );

var v = csubf( z1, z2 );
// returns <Complex64>[ 7.0, 2.0 ]

Examples

var Complex64Array = require( '@stdlib/array/complex64' );
var discreteUniform = require( '@stdlib/random/array/discrete-uniform' );
var logEachMap = require( '@stdlib/console/log-each-map' );
var csubf = require( '@stdlib/complex/float32/base/sub' );

// Generate arrays of random values:
var z1 = new Complex64Array( discreteUniform( 200, -50, 50 ) );
var z2 = new Complex64Array( discreteUniform( 200, -50, 50 ) );

// Perform element-wise subtraction:
logEachMap( '(%s) - (%s) = %s', z1, z2, csubf );

C APIs

Usage

#include "stdlib/complex/float32/base/sub.h"

stdlib_base_complex64_sub( z1, z2 )

Subtracts two single-precision complex floating-point numbers.

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

stdlib_complex64_t z1 = stdlib_complex64( 5.0f, 3.0f );
stdlib_complex64_t z2 = stdlib_complex64( -2.0f, 1.0f );
stdlib_complex64_t out = stdlib_base_complex64_sub( z1, z2 );

float re = stdlib_complex64_real( out );
// returns 7.0f

float im = stdlib_complex64_imag( out );
// returns 2.0f

The function accepts the following arguments:

  • z1: [in] stdlib_complex64_t input value.
  • z2: [in] stdlib_complex64_t input value.
stdlib_complex64_t stdlib_base_complex64_sub( const stdlib_complex64_t z1, const stdlib_complex64_t z2 );

Examples

#include "stdlib/complex/float32/base/sub.h"
#include "stdlib/complex/float32/ctor.h"
#include "stdlib/complex/float32/reim.h"
#include <stdio.h>

int main( void ) {
    const stdlib_complex64_t x[] = {
        stdlib_complex64( 3.14f, 1.5f ),
        stdlib_complex64( -3.14f, 1.5f ),
        stdlib_complex64( 0.0f, -0.0f ),
        stdlib_complex64( 0.0f/0.0f, 0.0f/0.0f )
    };

    stdlib_complex64_t v;
    stdlib_complex64_t y;
    float re;
    float im;
    int i;
    for ( i = 0; i < 4; i++ ) {
        v = x[ i ];
        stdlib_complex64_reim( v, &re, &im );
        printf( "z = %f + %fi\n", re, im );

        y = stdlib_base_complex64_sub( v, v );
        stdlib_complex64_reim( y, &re, &im );
        printf( "csubf(z, z) = %f + %fi\n", re, im );
    }
}

See Also