I am making a TGraph2D with 400200 bins from which I need to interpolate 4002000 points. My approach to do this is a simple nested loop where I do g->Interpolate(x,y). I have calculated that this would take more than a week to run through (1sec per point) which of course is way too much. So I am asking for any tips how to do this more clever and faster!
Thank you Rene for this tip. I am however using 5.18 and if I understand correctly this is implemented in version 5.24. I have tried to upgrade, but my machine is Ubuntu 9.10 and it seems to be problematic to get 5.24 to run under this. Do you (or anyone else!) have an idea how I can solve this interpolation problem in 5.18?