I want to have a TGraph which looks like a histogram but I do not get
along with the necessary TGraph options.
I have a Float_t array FD with my (equidistant values).
If I create another array XD with the x-axis values (bin numbers) and do
TGraph gr(nbins, XD, FD); gr.Draw("AL")
I get a graph with straight lines joining the points (and the x range is
somewhat extended). When I use gr.Draw("AB") I get boxes around every bin
which is somewhat more but not entirely like a histogram.
My question is how do I use the options of TGraph::PaintGraph and
TGraph::PaintGrapHist?
The documentation mentions the possibility to use min/max values for the
axis, what data do I have to supply and how do I indicate this mode?
If I call TGraph::PaintGrapHist it either segfaults or does nothing. What
type of data do I have to supply and which options to choose? Why is there
no "histogram" option to TGraph::Draw?
Thanks
Robert