Hi Stelios, If you have a TH3F, you should be able to fit it with a TF3 Did you try ? We are planning to introduce soon a TGraph3D class. Rene Brun On Sat, 19 Jul 2003, Stilianos Kesisoglou wrote: > Hi, > > Is it possible to make a 3D graph on ROOT and then fit it with a user defined function? > > I have a set of points (x,y,z) that belong to a spherical surface and I would like to place them on a graph > (like in the 2D case) and then fit a sphere through them to get the center and the radius. > > I can plot the points in a 3D scatter plot (using a histogram - TH3F), but then I can't fit the histogram using a function > > Is there anything available for this on ROOT? > > Thanks! > > Stelios. >
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