Do the inverse operation of this reshape?

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Davidra Fantarina ANDRIAMISAINA 2018-2-13

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回答： James Tursa 2018-2-13

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,[]);

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Answer 1

Roger Stafford 2018-2-13

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编辑：Roger Stafford 2018-2-13

在 MATLAB Online 中打开

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".