isProbabilityf

Test if a single-precision floating-point number is a probability.

Usage

var isProbabilityf = require( '@stdlib/math/base/assert/is-probabilityf' );

isProbabilityf( x )

Tests if a single-precision floating-point number is a probability.

var bool = isProbabilityf( 0.5 );
// returns true

bool = isProbabilityf( 3.14 );
// returns false

bool = isProbabilityf( NaN );
// returns false

Examples

var uniform = require( '@stdlib/random/array/uniform' );
var isProbabilityf = require( '@stdlib/math/base/assert/is-probabilityf' );

var bool;
var opts;
var x;
var i;

opts = {
    'dtype': 'float32'
};
x = uniform( 100, -1.0, 1.0, opts );

for ( i = 0; i < 100; i++ ) {
    bool = isProbabilityf( x[ i ] );
    console.log( '%d is %s', x[ i ], ( bool ) ? 'a probability' : 'not a probability' );
}

C APIs

Usage

#include "stdlib/math/base/assert/is_probabilityf.h"

stdlib_base_is_probabilityf( x )

Tests if a single-precision floating-point number is a probability.

bool out = stdlib_base_is_probabilityf( 0.5f );
// returns true

out = stdlib_base_is_probabilityf( 3.14f );
// returns false

The function accepts the following arguments:

x: [in] float input value.

bool stdlib_base_is_probabilityf( const float x );

Examples

#include "stdlib/math/base/assert/is_probabilityf.h"
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>

int main( void ) {
    float x;
    bool v;
    int i;

    for ( i = 0; i < 100; i++ ) {
        x = ( ( (float)rand() / (float)RAND_MAX ) * 2.0f ) - 1.0f;
        v = stdlib_base_is_probabilityf( x );
        printf( "%f is %sa probability\n", x, ( v ) ? "" : "not " );
    }
}