Creating a 3-dim matrix from an array and a 2-dim matrices array
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Valentina Baljak
on 22 Apr 2015
Commented: Valentina Baljak
on 22 Apr 2015
I am trying to create a 3-dimensional matrix (e.g. 80 x 300 x 350) from an array (dim 80) and an array of 80 300 x 350 matrices. The second dimension in matrices may vary, so it needs to be padded by 0.
Any hint is welcome.
I have tried this:
for i=1:80
res(i,:,:)=cell2mat(s1(i));
end
and got this:
Subscripted assignment dimension mismatch.
Thank you
2 Comments
James Tursa
on 22 Apr 2015
If you are using the 300 x 350 slices downstream in your code, you might consider making those the first two dimensions of your 3D matrix so the slices are contiguous in memory. E.g., a 300 x 350 x 80 array.
Accepted Answer
Sean de Wolski
on 22 Apr 2015
Close! but using :,: means that it must fill the whole thing, not pad with zeros. Instead, only fill to the size:
for i=1:80
sii = cell2mat(s1(i));
res(i,1:size(sii,1),1:size(sii,2)) = permute(sii,[3 1 2]); % permute to write orientation
end
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