README.md

add4

Compute the sum of four double-precision complex floating-point numbers.

Usage

var add4 = require( '@stdlib/complex/float64/base/add4' );

add4( z1, z2, z3, z4 )

Computes the sum of four double-precision complex floating-point numbers.

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

var z = new Complex128( -1.5, 2.5 );

var v = add4( z, z, z, z );
// returns <Complex128>[ -7.5, 12.5 ]

The function supports the following parameters:

• z1: first complex number.
• z2: second complex number.
• z3: third complex number.
• z4: fourth complex number.

add4.assign( re1, im1, re2, im2, re3, im3, re4, im4, out, strideOut, offsetOut )

Computes the sum of four double-precision complex floating-point numbers and assigns results to a provided output array.

var Float64Array = require( '@stdlib/array/float64' );

var out = new Float64Array( 2 );
var v = add4.assign( 5.0, 3.0, -2.0, 1.0, 5.0, 3.0, 1.0, 4.0, out, 1, 0 );
// returns <Float64Array>[ 9.0, 11.0 ]

var bool = ( out === v );
// returns true

The function supports the following parameters:

• re1: real component of the first complex number.
• im1: imaginary component of the first complex number.
• re2: real component of the second complex number.
• im2: imaginary component of the second complex number.
• re3: real component of the third complex number.
• im3: imaginary component of the third complex number.
• re4: real component of the fourth complex number.
• im4: imaginary component of the fourth complex number.
• out: output array.
• strideOut: stride length for out.
• offsetOut: starting index for out.

add4.strided( z1, sz1, oz1, z2, sz2, oz2, z3, sz3, oz3, z4, sz4, oz4, out, so, oo )

Computes the sum of four double-precision complex floating-point numbers stored in real-valued strided array views and assigns results to a provided strided output array.

var Float64Array = require( '@stdlib/array/float64' );

var z1 = new Float64Array( [ 5.0, 3.0 ] );
var z2 = new Float64Array( [ -2.0, 1.0 ] );
var z3 = new Float64Array( [ 5.0, 3.0 ] );
var z4 = new Float64Array( [ 1.0, 4.0 ] );
var out = new Float64Array( 2 );

var v = add4.strided( z1, 1, 0, z2, 1, 0, z3, 1, 0, z4, 1, 0, out, 1, 0 );
// returns <Float64Array>[ 9.0, 11.0 ]

var bool = ( out === v );
// returns true

The function supports the following parameters:

• z1: first complex number strided array view.
• sz1: stride length for z1.
• oz1: starting index for z1.
• z2: second complex number strided array view.
• sz2: stride length for z2.
• oz2: starting index for z2.
• z3: third complex number strided array view.
• sz3: stride length for z3.
• oz3: starting index for z3.
• z4: fourth complex number strided array view.
• sz4: stride length for z4.
• oz4: starting index for z4.
• out: output array.
• so: stride length for out.
• oo: starting index for out.

Examples

var Complex128Array = require( '@stdlib/array/complex128' );
var discreteUniform = require( '@stdlib/random/array/discrete-uniform' );
var logEachMap = require( '@stdlib/console/log-each-map' );
var add4 = require( '@stdlib/complex/float64/base/add4' );

// Generate arrays of random values:
var z1 = new Complex128Array( discreteUniform( 200, -50, 50 ) );
var z2 = new Complex128Array( discreteUniform( 200, -50, 50 ) );
var z3 = new Complex128Array( discreteUniform( 200, -50, 50 ) );
var z4 = new Complex128Array( discreteUniform( 200, -50, 50 ) );

// Perform element-wise addition:
logEachMap( '(%s) + (%s) + (%s) + (%s) = %s', z1, z2, z3, z4, add4 );

---

C APIs

Usage

#include "stdlib/complex/float64/base/add4.h"

stdlib_base_complex128_add4( z1, z2, z3, z4 )

Computes the sum of four double-precision complex floating-point numbers.

#include "stdlib/complex/float64/ctor.h"
#include "stdlib/complex/float64/real.h"
#include "stdlib/complex/float64/imag.h"

stdlib_complex128_t z = stdlib_complex128( 3.0, -2.0 );

stdlib_complex128_t out = stdlib_base_complex128_add4( z, z, z, z );

double re = stdlib_complex128_real( out );
// returns 12.0

double im = stdlib_complex128_imag( out );
// returns -8.0

The function accepts the following arguments:

• z1: [in] stdlib_complex128_t first input value.
• z2: [in] stdlib_complex128_t second input value.
• z3: [in] stdlib_complex128_t third input value.
• z4: [in] stdlib_complex128_t fourth input value.

stdlib_complex128_t stdlib_base_complex128_add4( const stdlib_complex128_t z1, const stdlib_complex128_t z2, const stdlib_complex128_t z3, const stdlib_complex128_t z4 );

Examples

#include "stdlib/complex/float64/base/add4.h"
#include "stdlib/complex/float64/ctor.h"
#include "stdlib/complex/float64/reim.h"
#include <stdio.h>

int main( void ) {
    const stdlib_complex128_t x[] = {
        stdlib_complex128( 3.14, 1.5 ),
        stdlib_complex128( -3.14, 1.5 ),
        stdlib_complex128( 0.0, -0.0 ),
        stdlib_complex128( 0.0/0.0, 0.0/0.0 )
    };

    stdlib_complex128_t v;
    stdlib_complex128_t y;
    double re;
    double im;
    int i;
    for ( i = 0; i < 4; i++ ) {
        v = x[ i ];
        stdlib_complex128_reim( v, &re, &im );
        printf( "z = %lf + %lfi\n", re, im );

        y = stdlib_base_complex128_add4( v, v, v, v );
        stdlib_complex128_reim( y, &re, &im );
        printf( "add4(z, z, z, z) = %lf + %lfi\n", re, im );
    }
}