220 lines
4.3 KiB
Markdown
220 lines
4.3 KiB
Markdown
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<!--
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@license Apache-2.0
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Copyright (c) 2020 The Stdlib Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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# clampf
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> Restrict a single-precision floating-point number to a specified range.
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<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->
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<section class="intro">
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</section>
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<!-- /.intro -->
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<!-- Package usage documentation. -->
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<section class="usage">
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## Usage
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```javascript
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var clampf = require( '@stdlib/math/base/special/clampf' );
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```
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#### clampf( v, min, max )
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Restricts a single-precision floating-point number to a specified range.
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```javascript
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var v = clampf( 3.0, 0.0, 5.0 );
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// returns 3.0
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v = clampf( -3.0, 0.0, 5.0 );
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// returns 0.0
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v = clampf( 10.0, 0.0, 5.0 );
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// returns 5.0
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v = clampf( -0.0, 0.0, 5.0 );
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// returns 0.0
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v = clampf( 0.0, -3.0, -0.0 );
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// returns -0.0
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```
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If provided `NaN` for any argument, the function returns `NaN`.
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```javascript
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var v = clampf( NaN, 0.0, 5.0 );
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// returns NaN
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v = clampf( 0.0, NaN, 5.0 );
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// returns NaN
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v = clampf( 3.14, 0.0, NaN );
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// returns NaN
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```
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</section>
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<!-- /.usage -->
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<!-- Package usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
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<section class="notes">
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</section>
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<!-- /.notes -->
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<!-- Package usage examples. -->
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<section class="examples">
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## Examples
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<!-- eslint no-undef: "error" -->
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```javascript
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var discreteUniform = require( '@stdlib/random/base/discrete-uniform' );
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var clampf = require( '@stdlib/math/base/special/clampf' );
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var min;
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var max;
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var v;
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var i;
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for ( i = 0; i < 100; i++ ) {
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min = discreteUniform( 0.0, 10.0 );
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max = discreteUniform( 5.0, 15.0 );
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v = discreteUniform( -20.0, 20.0 );
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console.log( 'clampf(%d,%d,%d) => %d', v, min, max, clampf( v, min, max ) );
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}
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```
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</section>
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<!-- /.examples -->
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<!-- C interface documentation. -->
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* * *
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<section class="c">
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## C APIs
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<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->
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<section class="intro">
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</section>
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<!-- /.intro -->
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<!-- C usage documentation. -->
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<section class="usage">
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### Usage
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```c
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#include "stdlib/math/base/special/clampf.h"
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```
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#### stdlib_base_clampf( v, min, max )
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Restricts a single-precision floating-point number to a specified range.
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```c
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float y = stdlib_base_clampf( -3.14f, 0.0f, 5.0f );
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// returns 0.0f
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```
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The function accepts the following arguments:
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- **v**: `[in] float` input value.
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- **min**: `[in] float` minimum value.
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- **max**: `[in] float` maximum value.
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```c
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float stdlib_base_clampf( const float v, const float min, const float max );
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```
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</section>
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<!-- /.usage -->
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<!-- C API usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
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<section class="notes">
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</section>
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<!-- /.notes -->
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<!-- C API usage examples. -->
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<section class="examples">
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### Examples
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```c
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#include "stdlib/math/base/special/clampf.h"
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#include <stdio.h>
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int main() {
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float x[] = { 3.14f, -3.14f, 0.0f, 0.0f/0.0f };
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float y;
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int i;
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for ( i = 0; i < 4; i++ ) {
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y = stdlib_base_clampf( x[ i ], -3.0f, 3.0f );
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printf( "clamp(%f, %f, %f) = %f\n", x[ i ], -3.0f, 3.0f, y );
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}
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}
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```
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</section>
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<!-- /.examples -->
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</section>
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<!-- /.c -->
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<!-- 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. -->
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<section class="references">
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</section>
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<!-- /.references -->
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<!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
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<section class="links">
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</section>
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<!-- /.links -->
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