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How to convert a column back into matrix?

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Explorer
Explorer 2016-3-23
编辑： Stephen23 2016-3-23
A matrix can be converted in column using matrix(:) but how to convert it back into matrix of same order?

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Guillaume
Guillaume 2016-3-23
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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