How to convert a column back into matrix?

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Explorer on 23 Mar 2016
Edited: Stephen on 23 Mar 2016
A matrix can be converted in column using matrix(:) but how to convert it back into matrix of same order?

Accepted Answer

Guillaume on 23 Mar 2016
If you don't know what the original size of the matrix was, then you of course can't since matlab does not keep the information.
If you do, use reshape:
A = randi([1 20], 10, 20, 30);
B = A(:);
AA = reshape(B, 10, 20, 30);
isequal(A, AA) %will return true
Note that A(:) is equivalent to
reshape(A, [], 1)

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