MATLAB: How to refer a high dimension matrix

indexingmatrix

I have a high dimensional matrix A, two row vectors ind1 and ind2. The length of ind1 and ind2 is flexible but
length(size(A))==length(ind1)+length(ind2)
is always true. So how can I refer to the element of A whose index is (ind1(1),…ind1(end),ind2(1),…ind2(end))? Since the length of ind1 and ind2 is flexible, I couldn't simply write out every index.

Best Answer

This is exactly what sub2ind is for, it generates the linear indices corresponding to subscript indices. Try doing something like this (untested):
ids = num2cell([ind1,ind2]);
idx = sub2ind(size(A),ids{:});
A(idx) % access that element
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