TCanvas *c1=new TCanvas;
TFile *f=new TFile("gic.root");
tree->Draw("ci:Iteration$>>(2500,0,2500,1000,0,0.0045)","","colz");
c1->Draw();
tree->Draw("ai:Iteration$>>(2500,0,2500,1000,0,0.018)","","colz");
c1->Draw();
tree->Draw("cu:Iteration$+1560>>(2500,1500,4000,1000,-0.05,5.5)","","colz");
c1->Draw();
tree->Draw("au:Iteration$+1560>>(2500,1500,4000,1000,-0.05,6.5)","","colz");
c1->Draw();