Do the inverse operation of this reshape?

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I have this code and it works but i don't know how to do the inverse operation. str is a string
cle= uint8(str);
key= reshape(cle'-'0',1,[]);

Answers (2)

Roger Stafford
Roger Stafford on 13 Feb 2018
Edited: Roger Stafford on 13 Feb 2018
You have to know the dimensions of the original array in order to get back to that, in which case you simply do a another ‘reshape’ to get there. That is, suppose size(A) = [4,7] and you do
A = reshape(A,14,2);
You can’t tell from the size of the new A that it was once 4-by-7, but if you know that it was, then
A = reshape(A,4,7)
will get you back there.
There is an overriding order in any array that 'reshape' does not alter, which is seen if you do this: A(:) for an array A. The order in A(:) will remain the same no matter how many reshapes are done on it. This is known as the array's "linear order".

James Tursa
James Tursa on 13 Feb 2018
Are you just trying to recover an original single line string? E.g.,
str = char(key+'0');

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