how to convert 2-D array to 1-D array

how to convert 2-D array of dimension n*m to 1-D array with length (n*m) if a=[1 2 3;4 5 6;7 8 9] i want a = [1 2 3 4 5 6 7 8 9] so how

Answer 1

[Guillaume]

transpose then reshape

a = reshape(a.', 1, [])

Answer 2

[Bosong Lin]

Hey,

Try this. A = [1,2;3,4]; A = A(:);

[Guillaume]

Ashraf wants the reshaping done by row, this would do it by column which is not what is asked. It produces [1;3;2;4] instead of [1,2,3,4]