How to fit graph with non-symmetric error bars?

Dear all,

I have looked through the example of myfit.C in the tutorials, it’s good. But now I want to fit a graph with non-symmetric error bars, i.e., for each point in the graph the upper error and the lower error are not the same. How to do it? Can anybody give me an example like myfit.C? Thanks very much!

All the best,

Use a TGraphAsymmErrors


It works! Realllllly thanks a lot!