getting the max and its positions from a 4D array
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I'm trying to find a way to get the Max value from a 4D array and get the position of each of the max values of the 4D array so that I can trace back and get those positions from another 4D array. It would be great if someone can help me. Thanks in advance!
What I want is to get all the max values of each individual rows and columns and the 3rd dimension and its positions in the 4D.
2 Comments
Guillaume
on 11 Sep 2019
each of the max
along which dimension(s)? Are you expected a 3D, 2D, 1D, or scalar value in return?
Answers (2)
Star Strider
on 11 Sep 2019
Try this:
A = rand(3,3,3,3); % Create Array
Amax = max(A(:)); % Maximum Value
Idx = find(A(:) == Amax); % Returns Linear Indices To All ‘Amax’ Values
[r,c,dim3,dim4] = ind2sub(size(A), Idx); % Returns Subscripts In Each Dimension For All ‘Amax’ Values
12 Comments
Guillaume
on 11 Sep 2019
Don't knoiw what before refers to.
oh wait I just realised this.
Really? you don't know what the size of each dimension is? Then, yes you're going to struggle writing your code if you don't know what is happening with your dimensions.
Andrei Bobrov
on 12 Sep 2019
Maybe this:
[m,n,k,f] = size(totalDistance);% here k = 1
[~,ij] = max(totalDistance,[],4);
[I,J,K] = ndgrid(1:m,1:n,1:3);
F = repmat(ij,1,1,3);
finalPixels = imagesList(sub2ind([m,n,3,f],I,J,K,F)); % [m,n,3,f] size of imagesList
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