Can I use different models to do a 2D fit?

Hello everyone. I am currently working in a two-dimensional interpolation.

I can write

sfX = fit([positions(:,1), positions(:,2)],windX_in_the_node_vector,'poly34')

witout any issue. However, if I check the documentation, I see that the only other surface fit that can be used is 'lowess'. Is this true or can I use splines or other alternative interpolation methodologies?

Best regards.

Jaime.

Answer 1

[Matt J]

Yes, but you don't need the Curve Fitting Toolbox just tod surface interpolation. With interp2 (if you have gridded data) you can use any of the ones listed here,

https://www.mathworks.com/help/matlab/ref/interp2.html#btyq8s0-1-method

If you have scattered samples, then with griddata, you can use any of the methods here,

https://www.mathworks.com/help/matlab/ref/griddata.html#bvkwume-method