docs: function partial( mu, b ) {
  	var lnb = ln( 2 * b );
  	/**
  	* FUNCTION: pdf( x )
  	*	Evaluates the probability density function (PDF) for a Laplace distribution.
  	*
  	* @private
  	* @param {Number} x - input value
  	* @returns {Number} evaluated PDF
  	*/
  	return function pdf( x ) {
  		var lnl = - lnb - abs( x - mu ) / b;
  		return exp( lnl );
  	};
  }