Package Exports
- @stdlib/complex-float64-real
- @stdlib/complex-float64-real/lib/index.js
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real
Return the real component of a double-precision complex floating-point number.
Installation
npm install @stdlib/complex-float64-realUsage
var real = require( '@stdlib/complex-float64-real' );real( z )
Returns the real component of a double-precision complex floating-point number.
var Complex128 = require( '@stdlib/complex-float64-ctor' );
var z = new Complex128( 5.0, 3.0 );
var re = real( z );
// returns 5.0Examples
var Complex128 = require( '@stdlib/complex-float64-ctor' );
var discreteUniform = require( '@stdlib/random-base-discrete-uniform' );
var filledarrayBy = require( '@stdlib/array-filled-by' );
var real = require( '@stdlib/complex-float64-real' );
function random() {
return new Complex128( discreteUniform( -10, 10 ), discreteUniform( -10, 10 ) ); // eslint-disable-line max-len
}
// Generate an array of random complex numbers:
var x = filledarrayBy( 100, 'complex128', random );
// returns <Complex128Array>
// 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/float64/real.h"stdlib_complex128_real( z )
Returns the real component of a double-precision complex floating-point number.
#include "stdlib/complex/float64/ctor.h"
stdlib_complex128_t z = stdlib_complex128( 5.0, 2.0 );
// ...
double re = stdlib_complex128_real( z );
// returns 5.0The function accepts the following arguments:
- z:
[in] stdlib_complex128_tdouble-precision complex floating-point number.
double stdlib_complex128_real( const stdlib_complex128_t z );Examples
#include "stdlib/complex/float64/real.h"
#include "stdlib/complex/float64/ctor.h"
#include <stdio.h>
int main( void ) {
const stdlib_complex128_t x[] = {
stdlib_complex128( 5.0, 2.0 ),
stdlib_complex128( -2.0, 1.0 ),
stdlib_complex128( 0.0, -0.0 ),
stdlib_complex128( 0.0/0.0, 0.0/0.0 )
};
int i;
for ( i = 0; i < 4; i++ ) {
printf( "real(v) = %lf\n", stdlib_complex128_real( x[ i ] ) );
}
}Notice
This package is part of 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, see the main project repository.
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License
See LICENSE.
Copyright
Copyright © 2016-2024. The Stdlib Authors.