plotting 2D data by interpolating

hi,

i have data for vector of 40 points for x and y, and Z is my experiment result, how can i interpolate for more x and y,

do i need to fit a function and interpolate? looking forward for suggestion.

Answer 1

[Rik]

Most functions with require you to resample to a regular rectangular grid, like interp2 does, so you'll have to use scatteredinterpolant.

[Rik]

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[Kommisetti]

hi Rik

thank you for your prompt answer and sorry for delayed reply, actually, I tried scatteredinterpolant, but interpolation results are very poor.

May be, let me explain problem clearly, I have (x,y) coordinates and corresponding Z values, basically height of the map at corresponding coordinates.

I want to have map with more coordinates with in the boundaries. basically, -1.5 to +1.5 in both x and Y direction.

let me know if you want me to share the few data points to understand the problem more clear.

looking forward for some help. thanks in advance.

[Rik]

The fewer data points you have, the harder it is for an interpolation method to be successful. Sharing the code you tried and the points you tried it with might help. The best thing would be to fit some function to your data, but that is usually impossible.