RF

rf

Random numbers from the F distribution (inversion method)

         x = rf(n,df1,df2)
	Input	n	positive integer or a vector [lig,col] of integers
		df1,df2	degrees of freedom

	Output	x	n-vector or a n-matrix of random numbers 
			chosen from Fisher-Snedecor distribution with
			df1 and df2 degrees of freedom

	(the F law with  degrees of freedom df1 and df2
	 is the law of (X/df1)/(Y/df2)  where  X and Y
	 are independent Chisquare random variables 
	 with one degree of freedom)