Starting gragh from zero at x-axis

[Tahany]

hi,

I am making a comparison between two graphs in the same canvas with time on the x-axis but found the x-axis has been shifted and not started from zero! I am not sure why does it happen and how to adjust it to start from 0??

mg.pdf (19.3 KB)

Thanks a lot,

[dastudillo]

How to set ranges on axis?

The viewing range for a histogram axis can be set from bin ifirst to ilast using the method TAxis::SetRange(ifirst, ilast). Example (hpxpy is a 2D histogram): { TFile f("hsimple.root"); hpxpy->Draw("colz"); hpxpy->GetYaxis()->SetRange(22,23); hpxpy->GetXaxis()->SetRange(18,19); } Sometimes it is more convenient to set this range using “User’s Coordinates” (axis values) rather than bin numbers. To do that one should use TAxis::SetRangeUser(ufirst, ulast). This method computes the cl…