function NX=rvanlsys(X, cf) 
% rvanlsys(X, cf)  generates a random variable matrix by using F() for the 
%    given cumulative function cf to act on the random variable matrix X. 
if iscf(cf)==0 
   error('invalid cumulative function') 
end 
s=size(X); 
NX=zeros(s); 
for i=1:s(1), 
   NX(i,:)=pval(cf, X(i,:)); 
end