Creating Vector from the following matrix

Please Given the following matrix A=[1 2 3; 4 5 6; 7 8 9], I would like to create a column vector B from A, such that B=[1;2;3;4;5;6;7;8;9]. I need this formular to compute large matrix data into a column vector. Thank you.

Answer 1

[SALAH ALRABEEI]

      B = reshape(A',1,[]);

[Onovo]

Thank you very much salah