Problem in using interp2

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IMC 2021-10-1

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评论： IMC 2021-10-1

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Hello,

I want to interpolate my latitude longitude values. They are in the form of matrix.

Lat = 406x270;

Lon = 406X270;

I have read docs about it but still can't figure out that how to do interpolation. Vq = interp2(X,Y,V,Xq,Yq). How to use V here? What is meant by 'Xq and Yq contain the coordinates of the query points'?

I have another variable M (2030x1354). So, I want Lat Lon to become:

Lat1 = 2030x1354;

Lon1 = 2030x1354;

So, should I use M instead of V? Then what about Xq and Yq?

After going through some questions I tried using meshgrid for it. But it gave me following error;

Error using repmat
Requested 109620x109620 (44.8GB) array exceeds maximum array size preference. Creation of arrays greater than this limit may take a long time
and cause MATLAB to become unresponsive.

Lat Lon data is attached. Is there anyother way to do interpolation? Thank you.

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KSSV 2021-10-1

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编辑：KSSV 2021-10-1

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Vq = interp2(X,Y,V,Xq,Yq) ;

In the above V is the value at (X,Y). You need to have that value.It seems you have only Lon and Lat here.

% Demo
[X,Y,Z] = peaks(100) ;    % Z is here V 
% Do interpolation 
x0 = min(X(:)) ; x1 = max(X(:)) ; 
y0 = min(Y(:)) ; y1 = max(Y(:)) ; 
x = linspace(x0,x1,50) ; 
y = linspace(y0,y1,50) ; 
[Xq,Yq] = meshgrid(x,y) ; 
Zq = interp2(X,Y,Z,Xq,Yq) ; 