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Conjugate each element in a double-precision complex floating-point vector.
import zlacgv from 'https://cdn.jsdelivr.net/gh/stdlib-js/lapack-base-zlacgv@deno/mod.js';Conjugates each element in a double-precision complex floating-point vector.
import Complex128Array from 'https://cdn.jsdelivr.net/gh/stdlib-js/array-complex128@deno/mod.js';
import real from 'https://cdn.jsdelivr.net/gh/stdlib-js/complex-float64-real@deno/mod.js';
import imag from 'https://cdn.jsdelivr.net/gh/stdlib-js/complex-float64-imag@deno/mod.js';
var zx = new Complex128Array( [ 1.0, 2.0, 3.0, 4.0 ] );
zlacgv( 2, zx, 1 );
var z = zx.get( 0 );
// returns <Complex128>
var re = real( z );
// returns 1.0
var im = imag( z );
// returns -2.0The function has the following parameters:
- N: number of indexed elements.
- zx: input
Complex128Array. - strideZX: stride length for
zx.
The N and stride parameters determine which elements in zx are conjugated. For example, to conjugate every other element in zx,
import Complex128Array from 'https://cdn.jsdelivr.net/gh/stdlib-js/array-complex128@deno/mod.js';
import real from 'https://cdn.jsdelivr.net/gh/stdlib-js/complex-float64-real@deno/mod.js';
import imag from 'https://cdn.jsdelivr.net/gh/stdlib-js/complex-float64-imag@deno/mod.js';
var zx = new Complex128Array( [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0 ] );
zlacgv( 2, zx, 2 );
var z = zx.get( 0 );
// returns <Complex128>
var re = real( z );
// returns 1.0
var im = imag( z );
// returns -2.0Note that indexing is relative to the first index. To introduce an offset, use typed array views.
import Complex128Array from 'https://cdn.jsdelivr.net/gh/stdlib-js/array-complex128@deno/mod.js';
import Complex128 from 'https://cdn.jsdelivr.net/gh/stdlib-js/complex-float64-ctor@deno/mod.js';
import real from 'https://cdn.jsdelivr.net/gh/stdlib-js/complex-float64-real@deno/mod.js';
import imag from 'https://cdn.jsdelivr.net/gh/stdlib-js/complex-float64-imag@deno/mod.js';
// Initial array:
var zx0 = new Complex128Array( [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0 ] );
// Create an offset view:
var zx1 = new Complex128Array( zx0.buffer, zx0.BYTES_PER_ELEMENT*1 ); // start at 2nd element
// Conjugate every element in `zx1`:
zlacgv( 3, zx1, 1 );
var z = zx0.get( 1 );
// returns <Complex128>
var re = real( z );
// returns 3.0
var im = imag( z );
// returns -4.0Conjugates each element in a double-precision floating-point vector using alternative indexing semantics.
import Complex128Array from 'https://cdn.jsdelivr.net/gh/stdlib-js/array-complex128@deno/mod.js';
import real from 'https://cdn.jsdelivr.net/gh/stdlib-js/complex-float64-real@deno/mod.js';
import imag from 'https://cdn.jsdelivr.net/gh/stdlib-js/complex-float64-imag@deno/mod.js';
var zx = new Complex128Array( [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 ] );
zlacgv.ndarray( 3, zx, 1, 0 );
var z = zx.get( 0 );
// returns <Complex128>
var re = real( z );
// returns 1.0
var im = imag( z );
// returns -2.0The function has the following additional parameters:
- offsetZX: starting index for
zx.
While typed array views mandate a view offset based on the underlying buffer, the offset parameter supports indexing semantics based on a starting index. For example, to conjugate every other element in the input strided array starting from the second element,
import Complex128Array from 'https://cdn.jsdelivr.net/gh/stdlib-js/array-complex128@deno/mod.js';
import real from 'https://cdn.jsdelivr.net/gh/stdlib-js/complex-float64-real@deno/mod.js';
import imag from 'https://cdn.jsdelivr.net/gh/stdlib-js/complex-float64-imag@deno/mod.js';
var zx = new Complex128Array( [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0 ] );
zlacgv.ndarray( 2, zx, 2, 1 );
var z = zx.get( 3 );
// returns <Complex128>
var re = real( z );
// returns 7.0
var im = imag( z );
// returns -8.0import discreteUniform from 'https://cdn.jsdelivr.net/gh/stdlib-js/random-base-discrete-uniform@deno/mod.js';
import filledarrayBy from 'https://cdn.jsdelivr.net/gh/stdlib-js/array-filled-by@deno/mod.js';
import Complex128 from 'https://cdn.jsdelivr.net/gh/stdlib-js/complex-float64-ctor@deno/mod.js';
import zlacgv from 'https://cdn.jsdelivr.net/gh/stdlib-js/lapack-base-zlacgv@deno/mod.js';
function rand() {
return new Complex128( discreteUniform( 0, 10 ), discreteUniform( -5, 5 ) );
}
var zx = filledarrayBy( 10, 'complex128', rand );
console.log( zx.toString() );
// Conjugate elements:
zlacgv( zx.length, zx, 1 );
console.log( zx.get( zx.length-1 ).toString() );This package is part of stdlib, a standard library 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.
See LICENSE.
Copyright © 2016-2025. The Stdlib Authors.
