nl_tokens: FUNCTIONS // FUNCTION : getPDF ( mu variance ) Returns a probability density function for a normal distribution with mean mu and variance s2 .
pl_tokens: function getPDF ( mu , s2 ) { var A = 1 / ( Math . sqrt ( s2 * 2 * Math . PI ) ) , B = - 1 / ( 2 * s2 ) ; /**
  		* FUNCTION: pdf( x )
  		*	Evaluates the probability distribution function at input value `x`.
  		*
  		* @private
  		* @param {Number} x - input value
  		* @returns {Number} evaluated PDF
  		*/ return function pdf ( x ) { <mask> C = x - mu ; return A * Math . exp ( B * C * C ) ; } ; }