code: function partial( mu, beta ) {
  
  	/**
  	* FUNCTION: cdf( x )
  	*	Evaluates the cumulative distribution function (CDF) for a Gumbel distribution.
  	*
  	* @private
  	* @param {Number} x - input value
  	* @returns {Number} evaluated CDF
  	*/
  	return function cdf( x ) {
  		var z = ( x - mu ) / beta;
  		return exp( -exp( -z ) );
  	};
  }
docs: PARTIAL // 
  FUNCTION: partial( mu, beta )
  Partially applies location parameter `mu` and scale parameter `beta` and returns a function for evaluating the cumulative distribution function (CDF) for a Gumbel distribution.
  
  @param {Number} mu - location parameter
  @param {Number} beta - scale parameter
  @returns {Function} CDF