Simple draw option problem

ROOT
1

Hi

I have a problem with drawing four tgrapherrors on the same plot.
I want different marker styles for each tgrapherror.
So the first tgraph i use draw option (after defining the TCanvas)
gr1->Draw(“AP”);

which gives me the correct markerstyle i aksed for. But then I do:

gr2->SetMarkerStyle(30);
gr2->Draw(“SAME”);
gr3->SetMarkerStyle(21);
gr3->Draw(“SAME”);
gr4->SetMarkerStyle(22);
gr4->Draw(“SAME”)’

Doing this does draw them all on the same canvas but I loose the marker.
It looks as the attached plot. If I ask it to Draw("AP); for each one it
doesnt draw them all on the same plot. Does anyone know how to keep
the marker and put them all on the same plot?
Thanks.

deltaTPlotNew.png796×372 4.56 KB

2

do:

gr2->SetMarkerStyle(30); 
gr2->Draw("P"); 
gr3->SetMarkerStyle(21); 
gr3->Draw("P"); 
gr4->SetMarkerStyle(22); 
gr4->Draw("P")'

as shown in the examples here: root.cern.ch/root/html/TGraphPainter.html