module Distribution
       module Weibull
       	      module GSL_
	      	     class << self

		     	   def pdf(x, k, lam)
		     	       GSL::Ran.weibull_pdf(x, lam, k)
		     	   end


		     	   def cdf(x, k, lam)
		     	       GSL::Cdf.weibull_P(x, lam, k)
		     	   end

		     	   def p_value(y, k, lam)
		     	       GSL::Cdf.weibull_Pinv(y, lam, k)
		     	   end
		    end
	      end
        end
end