How to convert 1D to 2D by Matlab program

Question

I would like to ask a question about Matlab program.

I have vector a

a = [1 2 3 4 5 6 7 8 9 10 11 12];

I would like to

Answer 1

Check out the reshape function and help page.

In particular,

B = reshape(A,m,n)

returns the m-by-n matrix B whose elements are taken column-wise from A. An error results if A does not have m*n elements.

Note that it is column-wise, so I suggest you make a matrix with 3 rows and 4 columns and then tip it on its side (A.' will take the transpose of a matrix).