Find values in a 3D array based on values in a seperate 3D array

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KS
KS 2019-8-8
评论： KS 2019-8-8
I have two seperate 3D arrays that have equivalent sizes. One array (M_data) is binary. If the value of an element =1, I'd like to save the value of the corresponding position from the second array (B_data) in a matrix. So far, it looks like my code is giving me the i,j,k positions of M_data that equal 1, but it isn't referencing the B_data and it's not saving any of the data to a matrix. It's been a while since I've worked in Matlab and frankly I was never much of an expert, so any help would be much appreciated.
for i=1:size(M_data,1)
for j=1:size(M_data,2)
for k=1:size(M_data,3)
if M_data(i,j,k)==1
output= i,j,k, B_data(i,j,k);
end
end
end
end

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采纳的回答

Andrei Bobrov
Andrei Bobrov 2019-8-8
lo = M_data == 1;
[ii,jj,k] = ind2sub(size(M_data),find(lo));
output = [ii,jj,k,B_data(lo)];

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