Dear root experts,
I have make a TGraphErrors with the information of an Histogram. Now I want to plot the number of events inside each bin on the plot, something that looks like this:
Anyone could explain me how to make it?
Many thanks, Nahual
Well, you would need to loop over the points in the TGraphErrors and get the X and Y coordinates. Probably the GetPoint method is best for that.
Then for each point, draw a TText at the point’s coordinates (maybe shifted a bit down) with the text label being the number you want.
You’ll probably have to play around a bit with the text size, position shifting, etc, before you can get it to look like your example.
Jean-François