Hello all,   I am trying to create a clustered bar chart by patient grouped by treatment and then by patients internally at each timepoint. Below is my code. But despite of numerous combinations using grouporder=ascending or data the bars won't stack up by treatment (trtp2) first. Rather they are ordered by usubjid. I tried sorting by trtp2 alone without other variables also. Is there anything wrong that I am doing ?   proc sort data= mo out=mo2 ; by atptn trtp2 usubjid ; run;   proc sgpanel data=mo2 ; panelby atptn / layout=columnlattice onepanel noborder colheaderpos=bottom novarname ; vbar usubjid / response=aval group=trtp2 groupdisplay=cluster CLUSTERWIDTH= 1 grouporder=data; colaxis display=(nolabel noticks ); rowaxis label=' ' grid offsetmax=0.025 ; keylegend/ title=""; run; ... View more