Subscripted assignment dimension mismatch

2012 4 11
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I have the following algorithm and i keep getting an error, can anyone help?
for i = 1:nSlice
D1 = squeeze(IMs(:, :, i));
range = double(max(D1(:)));
norm_im = double(D1)/range;
level = graythresh(norm_im);
new_level = level*c_range;
BW = (D1>new_level);
IM_s(:,:,i) = BW(:); % error line
end

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Geoff
Geoff 2012-4-11
Please edit your question and format the code as 'code' (highlight and press the 'code' button on the toolbar. Also, on which line does the error occur?

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Geoff
Geoff 2012-4-11

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When you reference BW(:), it turns your matrix into a vector. Just do this:
IM_s(:,:,i) = BW;
Assuming that IM_s(:,:,i) is actually the same dimension as IMs(:,:,i)...

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Mugo
Mugo 2012-4-11
Thanks, it solved the error i was having but IMs and IM_s have different dimensions. So now i cant display IM_s like...
imagesc(IM_s(:,:,10));
Geoff
Geoff 2012-4-11
Well, if it got rid of the error, then the first two dimensions of IM_s and IMs must surely be the same. When you say you "can't display" IM_s(:,:,10), what do you mean? Does it give you an error, or just a solid colour?
Mugo
Mugo 2012-4-11
Oh my bad, they are the same dimensions but different sizes. size(IMs)= [512 512 34] and size(IM_s)=[2 2 34] so im getting a solid colour.
Geoff
Geoff 2012-4-11
So, don't you want them to be the same dimension? I see you have accepted my answer, but have you resolved your problem?
Mugo
Mugo 2012-4-12
Im happy with the solution to my initial error problem, but the dimension issue is a different thing im working on currently. I will post a new question if i cant figure it out. Thanks for your help...

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