On Mon, 19 Oct 2009, [iso-8859-1] Ricardo Gon�alves Silva wrote: > I need to do a scatter plot by two groups (like time and > individual, in a panel data). > I have continuous data and 4 classes for each grouping variable > (16 combinations). > Can Gretl does this? Sorry this has taken a while. If I have the right idea of what it is you want to do, you can do a sequence of scatter plots using a loop and the "smpl" command. Suppose we have variables of interest y and x, and a group variable "byvar", and we want a scatter of y versus x for each value of byvar: matrix byvals = sort(values(byvar)) scalar nvals = rows(byvals) loop i=1..nvals smpl byvar=byvals[i] --restrict gnuplot y x smpl --full endloop The same idea can be extended to the case of two grouping variables, with an inner loop pertaining to (say) "byvar2". matrix byvals = sort(values(byvar)) scalar n = rows(byvals) matrix byvals2 = sort(values(byvar2)) scalar m = rows(byvals2) loop i=1..n loop j=1..m smpl byvar=byvals[i] && byvar2=byvals2[j] --restrict gnuplot y x smpl --full endloop endloop Allin Cottrell

_______________________________________________ Gretl-users mailing list Gretl-users(a)lists.wfu.edu http://lists.wfu.edu/mailman/listinfo/gretl-users