Histogram Fill Style/Color

ROOT
1

I’m having problems changing the fill color and style of a histogram. A colleague of mine sent me a root file containing a TCanvas, from which I grabbed a histogram, TH1F. However, no matter what I do, I can’t seem to change the fill style or drawing options of the histogram itself. The only things I can change are the marker size/style/color. I would really like to change the points to a curve or line, and also fill it.

I’ve tried the standard method I always use (explained here: TAttFill at root.cern.ch/root/html/TAttFill.html ) but to no avail.

I’m guessing it has something to do with the way the histogram is taken from the TCanvas, since I do this fairly often with histograms I create myself and have never had any problems.

Any ideas?

I apologize in advance if this has been answered before, but I did look and could not find anything.

2

put gROOT->ForceStyle(); in your rootlogon.C

3

Thanks for the response, but this did not work.

I’ve attached a sample macro, but I’m not sure if this will help. Maybe you need the root file that the macro read in?
example.C (1.26 KB)

4

yes

5

Thanks again for the quick response. Here is a slightly updated macro (that should work!) and the root file.
file1.root (34.8 KB)
example.C (1.29 KB)

6 
        C12->SetFillStyle(3001);
        C12->SetFillColor(kRed);
        C12->Draw( "hist same");

See the option HIST documentation.

7

That worked. Thanks very much!