Hi, I have a dataset of x, y, z, val, something like 1 1 1 5 2 2 2 6 3 3 3 7 where val is actually a function of of x, y, z, so val = f (x, y, z). how does one generate a 3-dim surface plot in root with this data (3 physical dim with the 4th dim being represented by color). i know how to do this in paw where one can just create a ntuple, read the dataset in, and plot the ntuple. But I can't quite figure out how to do the equivalent in root. Any help is appreciated, john
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