How to convert a column back into matrix?

A matrix can be converted in column using matrix(:) but how to convert it back into matrix of same order?

Answer 1

[Guillaume]

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)

[Explorer]

Thank you!