PHP MathPHP\Probability\Distribution\Continuous Normal::PDF Examples

PDF() public static method

1 f(x|μ,σ) = ----- ℯ^−⟮x − μ⟯²∕2σ² σ√⟮2π⟯

public static PDF ( number $x, number $μ, number $σ ) : float
$x	number	random variable
$μ	number	mean
$σ	number	standard deviation
return	float	f(x|μ,σ)

Example #1

File: StandardNormal.php Project: markrogoyski/math-php

 /**
  * Probability density function
  *
  * @param number $z random variable
  *
  * @return float f(z|μ,σ)
  */
 public static function PDF($z)
 {
     Support::checkLimits(self::LIMITS, ['z' => $z]);
     return Normal::PDF($z, self::μ, self::σ);
 }