How can I solve this problem.

My version MATLAB is quite old. So I don't have the TriScatteredInterp and griddedInterpolant. Can I download these command? How can I obtain this?

Answer 1

[John D'Errico]

No. Learn to use griddata instead.

[Matt J]

Or INTERPN in lieu of griddedInterpolant.

[Francesco]

You said me the command but nobody tell me how to utilize it!

[Image Analyst]

I thought I did show you how to use griddata, but now I can't find it. I do remember running the code and just increasing the resolution and getting a nice looking surface. But that's what happens when you post the same question in 8 different threads, some of which you've already accepted solutions for.

[Matt J]

You said me the command but nobody tell me how to utilize it!

You should be reading its documentation for that, either online or using the commands DOC and HELP.