interpolating in 3 dimension for each cell position
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hei,
i have a 3d matrix, where each layer into the 3rd dimension is a new measurement. i would like to interpolate invalid values (nans) along the 3rd dimension. one way i figured this out was doing it this way:
dd=squeeze(distProfile(2, 13, :));
dd_x=find(~isnan(dd));
dd_y=dd(~isnan(dd));
yi=interp1(dd_x,dd_y,1:length(dd));
distProfile(2, 13, :)=yi;
this works for one cell, however i have a couple of matrices 104x13x500. therefore i dont wanna have two loops going through every cell.
1 Comment
Image Analyst
on 15 Nov 2011
I'm not sure how you're defining "cell." To you, what does that mean? Is it like MATLAB defines cell (like a bucket or container into which you can thrown any type of variable) or do you mean it's the connected region of nan voxels, or do you mean "element" and are using cell like Excel defines cell?
Answers (1)
Sean de Wolski
on 15 Nov 2011
It looks as though John's inpaint_nans3 has been removed from the FEX. It's what I would've recommended to start with. Perhaps look at Damien Garcia's
2 Comments
Sean de Wolski
on 15 Nov 2011
It sounds like that might be your best bet. You could look at interp1q for quick linear interpolation.
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