[Gretl-users] boxplot of matrix

Dear gretl users, I have created a matrix with 4 columns and 1000 rows and now I'd like to use the boxplot command on it, but it is (despite it should) not working... what am I getting wrong? Here is a MWE: ---------- nulldata 1000 matrix A=zeros(1000,4) loop for r=1..1000 loop for c=1..4 A[r,c]= randgen1(u,0,c) endloop endloop boxplot --matrix=A --output=display ------------ Error msg: ? boxplot --matrix=A --output=display Command has insufficient arguments The only thing I could find about this was a rather old post by Sven: http://lists.wfu.edu/pipermail/gretl-devel/2009-April/001894.html Any help is appreciated Frederik