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From: Orin Richards on 14 Dec 2009 19:48
Hi All,
I have a problem with the SGPANEL procedure. I am trying to produce boxplots but I keep getting a message
that the variables should for the "by" and "panelby" statements. I have done this and the message still occurs.

the general form of the procedure I am using is:-

proc
sgpanel data=ds1;
by trt;
panelby par1/ lattice novarname;
vbox var1 / category= var2 ;
run;

The error message suggests that I should sort by trt and par1 which I have done.

Does any one have any possible solutions.

Thanks for you help

Orin
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