Hello!
I am trying to iterate over rows of a matrix (Z) and fit a curve to each row and then subtract the fitted curve from the original data, however all of my rows contain NaN values. I would like to somehow fit the curve ignoring the NaN values, to subtract this curve from my original matrix row of values. The result would be a matrix with the same dimensions as my original, with the curve subtracted from real values and NaN values in their original place holders. I have thought about indexing NaN values using isnan() and then applying the polyfit to values when isnan() == 0 but everything I've tried so far hasn't quite worked out.
This is what it looks like so far:
for j = 1:m;
nx = size(Z,2);
x = 1:nx;
p = polyfit(x,Z(j,:),2);
y = polyval(p,x)
Z(j,:) = Z(j,:) - y;
end
Thanks for your help!
