MATLAB: Indices of a maximum value in a multidimensional matrix.

functionsMATLABmatrixmax

Hi, I have a multidimensional matrix of size (100,16,4,10) and i want to calculate all the 4 indices of the max value in it? Any help please.

a=rand(100,16,4,10);  %Example
[max_value,idx]=max(a(:))
[x,y,z,w]=ind2sub(size(a),idx)

If the dimension of a is unknown

a=rand(100,16,4,10);
[max_value,idx]=max(a(:))
x=cell(ndims(a),1)
[x{:}]=ind2sub(size(a),idx)

M=rand(2,2,3);
out=min(reshape(min(M),size(M,2),[],1))'

out=arrayfun(@(x) min(min(M(:,:,x))),1:size(M,3))'

If you want to get the corresponding index

M=rand(6,4,5);
[n,m,p]=size(M)
[c,idx]=min(M)
[c1,idx2]=min(c)
idx1=arrayfun(@(x) idx(1,idx2(1,1,x),x),(1:p)') 
v=[c1(:) idx1(:) idx2(:) (1:p)' ]

a=rand(3,4,5);
[min_v,idx]=min(a(:))
[ii,jj,kk]=ind2sub(size(a),idx)