time-to-botec

Benchmark sampling in different programming languages
Log | Files | Refs | README

README.md (3283B)

      1 <!--
      2 
      3 @license Apache-2.0
      4 
      5 Copyright (c) 2018 The Stdlib Authors.
      6 
      7 Licensed under the Apache License, Version 2.0 (the "License");
      8 you may not use this file except in compliance with the License.
      9 You may obtain a copy of the License at
     10 
     11    http://www.apache.org/licenses/LICENSE-2.0
     12 
     13 Unless required by applicable law or agreed to in writing, software
     14 distributed under the License is distributed on an "AS IS" BASIS,
     15 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     16 See the License for the specific language governing permissions and
     17 limitations under the License.
     18 
     19 -->
     20 
     21 # Flipsign
     22 
     23 > Return a complex number with the same magnitude as `z` and the sign of `y*z`.
     24 
     25 <!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->
     26 
     27 <section class="intro">
     28 
     29 </section>
     30 
     31 <!-- /.intro -->
     32 
     33 <!-- Package usage documentation. -->
     34 
     35 <section class="usage">
     36 
     37 ## Usage
     38 
     39 ```javascript
     40 var cflipsign = require( '@stdlib/math/base/special/cflipsign' );
     41 ```
     42 
     43 #### cflipsign( \[out,] re, im, y )
     44 
     45 Returns a complex number with the same magnitude as `z` and the sign of `y*z`.
     46 
     47 ```javascript
     48 var v = cflipsign( -4.2, 5.5, -4 );
     49 // returns [ 4.2, -5.5 ]
     50 
     51 v = cflipsign( 0.0, 0.0, 5 );
     52 // returns [ 0.0, 0.0 ]
     53 
     54 v = cflipsign( NaN, NaN, 6 );
     55 // returns [ NaN, NaN ]
     56 ```
     57 
     58 By default, the function returns real and imaginary components as a two-element `array`. To avoid unnecessary memory allocation, the function supports providing an output (destination) object.
     59 
     60 ```javascript
     61 var Float64Array = require( '@stdlib/array/float64' );
     62 
     63 var out = new Float64Array( 2 );
     64 
     65 var v = cflipsign( out, -4.2, 5.5, 77 );
     66 // returns <Float64Array>[ -4.2, 5.5 ]
     67 
     68 var bool = ( v === out );
     69 // returns true
     70 ```
     71 
     72 </section>
     73 
     74 <!-- /.usage -->
     75 
     76 <!-- Package usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
     77 
     78 <section class="notes">
     79 
     80 </section>
     81 
     82 <!-- /.notes -->
     83 
     84 <!-- Package usage examples. -->
     85 
     86 <section class="examples">
     87 
     88 ## Examples
     89 
     90 <!-- eslint no-undef: "error" -->
     91 
     92 ```javascript
     93 var Complex128 = require( '@stdlib/complex/float64' );
     94 var randu = require( '@stdlib/random/base/randu' );
     95 var real = require( '@stdlib/complex/real' );
     96 var imag = require( '@stdlib/complex/imag' );
     97 var cflipsign = require( '@stdlib/math/base/special/cflipsign' );
     98 
     99 var re;
    100 var im;
    101 var z;
    102 var o;
    103 var w;
    104 var i;
    105 var y;
    106 
    107 for ( i = 0; i < 100; i++ ) {
    108     re = ( randu()*100.0 ) - 50.0;
    109     im = ( randu()*100.0 ) - 50.0;
    110     y = ( randu()*100.0 ) - 50.0;
    111     z = new Complex128( re, im );
    112     o = cflipsign( real(z), imag(z), y );
    113     w = new Complex128( o[ 0 ], o[ 1 ] );
    114     console.log( 'flipsign(%s) = %s', z.toString(), w.toString() );
    115 }
    116 ```
    117 
    118 </section>
    119 
    120 <!-- /.examples -->
    121 
    122 <!-- Section to include cited references. If references are included, add a horizontal rule *before* the section. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
    123 
    124 <section class="references">
    125 
    126 </section>
    127 
    128 <!-- /.references -->
    129 
    130 <!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
    131 
    132 <section class="links">
    133 
    134 </section>
    135 
    136 <!-- /.links -->