Render excel data in 3D and interpolate.

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Hi I am new to matlab, sorry if this being trivial.

I am working with geodata. I have an Excel file containing x,y,z and some data values representing concentration of different minerals (Au, which is gold, is among them). First of all, I need to render the stuff in 3D, and paint it with graduated color (depending on Au concentration). This is the simplest part.

Then I need to interpolate Au concentrations inside point cloud of given data. I am thinking about some sort of gridding, I suppose.

Please give me some intro...

Any ideas appreciated, thanks in advance!

Sergey