How to extract ECMWF data in specific point?

Thank you for

I need to extract ECMWF data in specific point and time.

ECMWF data that downloaded is in area of South China Sea (2021; 4-dimensional), I just need extract data from one point only.

Could you help me, please

Answer 1

[KSSV]

Let A be your 3d data. If you know the indices (i,j) just use:

iwant = squeeze(A(i,j,:)) ; 

If you hvave the grid coordinates X, Y and the you want to extract points at (x,y) use:

idx = knnsearch([X(:) Y(:)],[x y]) ; 
[i,j] = ind2sub(size(X),idx) ;
iwant = squeeze(A(j,i,:)) ;