Elias, > func->SetArg((long)i); > func->SetArg((long)j); > func->SetArg((long)k); Based on the TF1 header file, the above should be double, double, long. > elathan@velka:/opt/root> ./cf > Function:fcn cannot be compiled It appears that the wrong overload is selected. > Any hints? Assuming that you're trying to get TF1 to work with ruby native functions: getting it to work with python functions was a little hellish. The current PyROOT implementation is by no means pretty to look at, but you would do yourself a favour to first look at pyroot/src/Pythonize.cxx (under the TF1 behaviour block), since it does work. Best regards, Wim -- Wim.Lavrijsen@cern.ch -- WLavrijsen@lbl.gov -- www.lavrijsen.net "Stop making excuses for your software." --first step towards quality
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