How can I extract all matrix elements for one index with dynamic number of dimenstions?

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Philipp
Philipp on 6 Apr 2017
Commented: Philipp on 6 Apr 2017
Hello experts,
let A be
A = rand(4, 4, 4); %
so what I want is:
B = reshape(A(1,:,:), [4 4])
The problem is the unknown dimension of A. So if A has the dimension of 3, I need 2 colon operator; if 4 then 3 and so on...
I am very thankful for any ideas...
BR

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Accepted Answer

Andrei Bobrov
Andrei Bobrov on 6 Apr 2017
ii = repmat({':'},1,ndims(A)-1);
out = squeeze(A(1,ii{:}));

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