Hi Everyone,
I’m trying to make someone else’s histogram prettier, but it turns out that they drew it in a really complicated way. Now I was able to draw a new histogram with the data in the file, and it looks the same (with my own modifications). So that is great, but I want to go one step further.
The way the plot is made, was by drawing a TMarker for every possible combination of x and y. The TMarker has different properties depending on the measurement outcome that was done with the combination of x an y. See the figure below:
Now what I would like to do is change the marker colour for certain markers, and I was wondering if I could access the TMarker’s properties in such a way that I can change them, or in such a way that I can draw a new marker with the same properties except for the colour.
At the moment I do the following:
allMyFiles = new TFile (getFileName("delay25_upstream"), "READ");
TCanvas *canv = (TCanvas*)allMyFiles->Get("/i2c/i2c_master/RDa vs. SDa for portcard i2c_master_upstream and module BPix_BpO_SEC1_LYR3_LDR1F_MOD1");
TList *lst = canv->GetListOfPrimitives();
TObject *ob;
TCanvas *c0 = allMyCanvasses(false, false);
TH2F *h0 = new TH2F("hist", "histo", 65, 64, 128, 65, 64, 128);
h0->Draw("hist");
for (int i=0; i<lst->GetSize(); i++) {
ob = lst->At(i);
// THIS IS WHERE I WANT TO CHANGE THE COLOR OF THE MARKER, WHICH IS AN OBJECT HERE
ob->Draw("same");
}//end for list
So I was wondering, can I get a TMarker back from a TObject that is a TMarker?
Thanks in advance for the help!
Cheers,
Nikkie
_ROOT Version:6.14/08
_Platform: CentOS7 - CERN
_Compiler:linuxx8664gcc