Subtract two double-precision complex floating-point numbers.
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> Subtract two double-precision complex floating-point numbers.
``bash`
npm install @stdlib/complex-float64-base-sub
`javascript`
var csub = require( '@stdlib/complex-float64-base-sub' );
#### csub( z1, z2 )
Subtracts two double-precision complex floating-point numbers.
`javascript
var Complex128 = require( '@stdlib/complex-float64-ctor' );
var z1 = new Complex128( 5.0, 3.0 );
var z2 = new Complex128( -2.0, 1.0 );
var v = csub( z1, z2 );
// returns
`
`javascript
var Complex128Array = require( '@stdlib/array-complex128' );
var discreteUniform = require( '@stdlib/random-array-discrete-uniform' );
var logEachMap = require( '@stdlib/console-log-each-map' );
var csub = require( '@stdlib/complex-float64-base-sub' );
// Generate arrays of random values:
var z1 = new Complex128Array( discreteUniform( 200, -50, 50 ) );
var z2 = new Complex128Array( discreteUniform( 200, -50, 50 ) );
// Perform element-wise subtraction:
logEachMap( '(%s) - (%s) = %s', z1, z2, csub );
`
*
`c`
#include "stdlib/complex/float64/base/sub.h"
#### stdlib_base_complex128_sub( z1, z2 )
Subtracts two double-precision complex floating-point numbers.
`c
#include "stdlib/complex/float64/ctor.h"
#include "stdlib/complex/float64/real.h"
#include "stdlib/complex/float64/imag.h"
stdlib_complex128_t z1 = stdlib_complex128( 5.0, 3.0 );
stdlib_complex128_t z2 = stdlib_complex128( -2.0, 1.0 );
stdlib_complex128_t out = stdlib_base_complex128_sub( z1, z2 );
double re = stdlib_complex128_real( out );
// returns 7.0
double im = stdlib_complex128_imag( out );
// returns 2.0
`
The function accepts the following arguments:
- z1: [in] stdlib_complex128_t input value.[in] stdlib_complex128_t
- z2: input value.
`c`
stdlib_complex128_t stdlib_base_complex128_sub( const stdlib_complex128_t z1, const stdlib_complex128_t z2 );
`c
#include "stdlib/complex/float64/base/sub.h"
#include "stdlib/complex/float64/ctor.h"
#include "stdlib/complex/float64/reim.h"
#include
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_sub( v, v );
stdlib_complex128_reim( y, &re, &im );
printf( "csub(z, z) = %lf + %lfi\n", re, im );
}
}
`
*
- [@stdlib/complex-float64/base/add][@stdlib/complex/float64/base/add]: add two double-precision complex floating-point numbers.
- [@stdlib/complex-float64/base/div][@stdlib/complex/float64/base/div]: divide two complex numbers.
- [@stdlib/complex-float64/base/mul][@stdlib/complex/float64/base/mul]: multiply two double-precision complex floating-point numbers.
*
This package is part of [stdlib][stdlib], a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.
For more information on the project, filing bug reports and feature requests, and guidance on how to develop [stdlib][stdlib], see the main project [repository][stdlib].
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---
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