Hello,
I was working with classes using the TH*::Interpolate() methods, and discovered that these are non-const methods. Digging through the code, it seems that this is because it makes use of the TAxis::FindBin() method, which allows for resizing the bins if a bit is set and the argument is outside of the axis range.
Is it possible for this to be changed so that Interpolate() becomes a const method? Implementing a const version of FindBin() and using that instead is all that’s requried - I’ve done it myself. I may be missing the point, but this seems like an oversight, as interpolation should be a purely read-only operation (getting a value out of a histogram).
In case you are interested, the reason this is necessary is that I have several read-only methods that were making use of interpolation. I currently am working around this by copying the full source code of Interpolate() and FindBin() for TH1, TH2, and TH3 and making the minor necessary changes.
Thanks and best regards,
Steven