Is There a TGraph3D class or similar one?

Newbie
1

Dear experts

I have a set of points f(x, y, s) that I want to do an interpolation, I know I can do this for f(x,y) by TGraph2D::Interpolation(), is there a similar TGraph3D to do it?

2

TGraph2D takes (x, y, z) points as inputs. The TGraph2D interpolation is based on Delaunay triangles. It assume that for one (x, y) coordinate there only one z coordinate (ie: duplicate (x,y) points are forbidden). There is no ROOT class interpolating random (x, y, z) clouds of points.

3

Thank you, I meant a set points that were (x, y, s, f(x, y, s)). Can some class do interpolation for this? 3 input 1 output

4

Ah ok. may be the GL classes:

https://root.cern/doc/v622/glparametric_8C_source.html
https://root.cern/doc/master/gltf3_8C_source.html