How do I perform interpolation on complex data using MATLAB?

2009 6 27

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I want to perform interpolation on complex data using MATLAB functions.

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The GRIDDATA function can be used to interpolate complex Z-data. Consider the following example:

xi = [2;3;-1;-5;1];
yi = [1;2;-4;-1;-2];
zi = [5+2j;1-j;2+4j;-7-3j;-1+6j];
xj = [-1;2;3];
yj = [3;-2;4];
zj = griddata(xi,yi,zi,xj,yj,'nearest')

Here, you can use the nearest neighbor method, using the 'nearest' argument. For more information on GRIDDATA, type

doc griddata

at the MATLAB prompt.

Note that the GRIDDATA function cannot handle complex X and Y-data.

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