Scattered Interpolant in matlab

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SGK on 14 Feb 2024

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Edited: Catalytic on 18 Feb 2024

I have matrices xs,ys,z. All the matrices are stored in a workspace and has size 41x50.

I would like to interpolate and store them in 2D lookup table. is it possible to use spline/cubic method in scatteredinterpolant command?

I used in the code but getting these errors.

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Answer 1

Star Strider on 14 Feb 2024

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The interpolation Method options are 'linear', 'nearest' and 'natural' (natural neighbor interpolation, giving no details that I can find, only an example).

The ExtrapolationMethod options are 'linear' 'nearest' or 'none'.

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SGK on 18 Feb 2024

Edited: SGK on 18 Feb 2024

out of these methods which can gives a good interpolation results?

I have seen that cubic and spline methods are very reliable since I cant able to use them in scatteredinterpolant what other methods can I use to interpolate these matrices?

Star Strider on 18 Feb 2024

I always experiment with all of them tto see which gives the best result, and again it depends on what I want to do (interpolate in a region, or draw a line on the surface, for example, because scatteredInterpolant computes lines well).

With respect to extrapolation, I again experiment, although in that instance, usually end up using 'nearest'.

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