How to use interpolation?

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민준 배 2022-11-6

评论： KSSV 2022-11-6

I have longitude, latitude, the veolocity of sea surface and a buoy velocity

I want to know the relationship between sea surface velocity and buoy velocity

so i want to interpolate the velocity of sea surface using interp2

in this case how do i make the function?

KSSV 2022-11-6

Is your sea surface velocity a 3D data?

민준 배 2022-11-6

no it is 2D data

KSSV 2022-11-6

Let lon,lat,U be your 2D data, and x,y,u be your buoy data.

Ui = interp2(lon,lat,U,x,y) ;

If your data is #d (I hope it is), then run loop for each time step.

Other option is; get the index of nearest neightbour of (x,y) in (lon,lat) and extract U for this index.

민준 배 2022-11-6

lon and lat data is 1440*720 single and the U data is 1440*720 double

KSSV 2022-11-6

Read about scatteredInterpolant or attach your data.

MATLAB Mathematics Interpolation

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