README.md (2993B)
1 <!-- 2 3 @license Apache-2.0 4 5 Copyright (c) 2020 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 # Cube Root 22 23 > Compute the [cube root][cube-root] of a single-precision floating-point number. 24 25 <section class="usage"> 26 27 ## Usage 28 29 ```javascript 30 var cbrtf = require( '@stdlib/math/base/special/cbrtf' ); 31 ``` 32 33 #### cbrtf( x ) 34 35 Computes the [cube root][cube-root] of a single-precision floating-point number. 36 37 ```javascript 38 var v = cbrtf( 64.0 ); 39 // returns 4.0 40 41 v = cbrtf( 27.0 ); 42 // returns 3.0 43 44 v = cbrtf( 0.0 ); 45 // returns 0.0 46 47 v = cbrtf( -0.0 ); 48 // returns -0.0 49 50 v = cbrtf( -9.0 ); 51 // returns ~-2.08 52 53 v = cbrtf( NaN ); 54 // returns NaN 55 ``` 56 57 </section> 58 59 <!-- /.usage --> 60 61 <section class="examples"> 62 63 ## Examples 64 65 <!-- eslint no-undef: "error" --> 66 67 ```javascript 68 var randu = require( '@stdlib/random/base/randu' ); 69 var cbrtf = require( '@stdlib/math/base/special/cbrtf' ); 70 71 var x; 72 var i; 73 74 for ( i = 0; i < 100; i++ ) { 75 x = (randu()*200.0) - 100.0; 76 console.log( 'cbrt(%d) = %d', x, cbrtf( x ) ); 77 } 78 ``` 79 80 </section> 81 82 <!-- /.examples --> 83 84 <!-- C interface documentation. --> 85 86 * * * 87 88 <section class="c"> 89 90 ## C APIs 91 92 <!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. --> 93 94 <section class="intro"> 95 96 </section> 97 98 <!-- /.intro --> 99 100 <!-- C usage documentation. --> 101 102 <section class="usage"> 103 104 ### Usage 105 106 ```c 107 #include "stdlib/math/base/special/cbrtf.h" 108 ``` 109 110 #### stdlib_base_cbrtf( x ) 111 112 Computes the cube root of a single-precision floating-point number. 113 114 ```c 115 float y = stdlib_base_cbrtf( 27.0f ); 116 // returns 3.0f 117 ``` 118 119 The function accepts the following arguments: 120 121 - **x**: `[in] float` input value. 122 123 ```c 124 float stdlib_base_cbrtf( const float x ); 125 ``` 126 127 </section> 128 129 <!-- /.usage --> 130 131 <!-- C API usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. --> 132 133 <section class="notes"> 134 135 </section> 136 137 <!-- /.notes --> 138 139 <!-- C API usage examples. --> 140 141 <section class="examples"> 142 143 ### Examples 144 145 ```c 146 #include "stdlib/math/base/special/cbrtf.h" 147 #include <stdio.h> 148 149 int main() { 150 float x[] = { 3.14f, 9.00f, 0.0f, 0.0f/0.0f }; 151 152 float y; 153 int i; 154 for ( i = 0; i < 4; i++ ) { 155 y = stdlib_base_cbrtf( x[ i ] ); 156 printf( "cbrt(%f) = %f\n", x[ i ], y ); 157 } 158 } 159 ``` 160 161 </section> 162 163 <!-- /.examples --> 164 165 </section> 166 167 <!-- /.c --> 168 169 <section class="links"> 170 171 [cube-root]: https://en.wikipedia.org/wiki/Cube_root 172 173 </section> 174 175 <!-- /.links -->