clampf

Restrict a single-precision floating-point number to a specified range.

Usage

var clampf = require( '@stdlib/math/base/special/clampf' );

clampf( v, min, max )

Restricts a single-precision floating-point number to a specified range.

var v = clampf( 3.0, 0.0, 5.0 );
// returns 3.0

v = clampf( -3.0, 0.0, 5.0 );
// returns 0.0

v = clampf( 10.0, 0.0, 5.0 );
// returns 5.0

v = clampf( -0.0, 0.0, 5.0 );
// returns 0.0

v = clampf( 0.0, -3.0, -0.0 );
// returns -0.0

If provided NaN for any argument, the function returns NaN.

var v = clampf( NaN, 0.0, 5.0 );
// returns NaN

v = clampf( 0.0, NaN, 5.0 );
// returns NaN

v = clampf( 3.14, 0.0, NaN );
// returns NaN

Examples

var discreteUniform = require( '@stdlib/random/base/discrete-uniform' );
var clampf = require( '@stdlib/math/base/special/clampf' );

var min;
var max;
var v;
var i;

for ( i = 0; i < 100; i++ ) {
    min = discreteUniform( 0.0, 10.0 );
    max = discreteUniform( 5.0, 15.0 );
    v = discreteUniform( -20.0, 20.0 );
    console.log( 'clampf(%d,%d,%d) => %d', v, min, max, clampf( v, min, max ) );
}

C APIs

Usage

#include "stdlib/math/base/special/clampf.h"

stdlib_base_clampf( v, min, max )

Restricts a single-precision floating-point number to a specified range.

float y = stdlib_base_clampf( -3.14f, 0.0f, 5.0f );
// returns 0.0f

The function accepts the following arguments:

v: [in] float input value.
min: [in] float minimum value.
max: [in] float maximum value.

float stdlib_base_clampf( const float v, const float min, const float max );

Examples

#include "stdlib/math/base/special/clampf.h"
#include <stdio.h>

int main() {
    float x[] = { 3.14f, -3.14f, 0.0f, 0.0f/0.0f };

    float y;
    int i;
    for ( i = 0; i < 4; i++ ) {
        y = stdlib_base_clampf( x[ i ], -3.0f, 3.0f );
        printf( "clamp(%f, %f, %f) = %f\n", x[ i ], -3.0f, 3.0f, y );
    }
}