// Draw a Bidimensional Histogram in many ways
// together with its profiles and projections

void macro7(){

gROOT->SetStyle("Plain");
gStyle->SetPalette(1);
gStyle->SetOptStat(0);
gStyle->SetOptTitle(0);

TH2F bidi_h("bidi_h","2D Histo;Guassian Vals;Exp. Vals",
30,-5,5, // X axis
30,0,10); // Y axis

TRandom3 rndgen;
for (int i=0;i<500000;i++){
    bidi_h.Fill(rndgen.Gaus(0,2),10-rndgen.Exp(4));}

TCanvas* c=new TCanvas("Canvas","Canvas",625,625);
c->Divide(2,2);
c->cd(1);
bidi_h.DrawClone("Cont1");
c->cd(2);
bidi_h.DrawClone("Colz");
c->cd(3);
bidi_h.DrawClone("lego2");
c->cd(4);
bidi_h.DrawClone("surf3");

//Profiles and Projections
TCanvas* c2=new TCanvas("Canvas2","Canvas2",625,625);
c2->Divide(2,2);
c2->cd(1);
bidi_h.ProjectionX()->DrawClone();
c2->cd(2);
bidi_h.ProjectionY()->DrawClone();
c2->cd(3);
bidi_h.ProfileX()->DrawClone();
c2->cd(4);
bidi_h.ProfileY()->DrawClone();
}