Question

Here is what I have:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]

And here is what I want to get:

[
  1,  2,  3,  4,
  5,  6,  7,  8,
  9, 10, 11, 12
] 

The number of rows and columns (3 and 4 in example) is already known.

How would I do that?

Answer 1

This guide says

mat = vec2mat(vec,matcol) converts the vector vec into a matrix with matcol columns, creating one row at a time. If the length of vec is not a multiple of matcol, then extra zeros are placed in the last row of mat. The matrix mat has ceil(length(vec)/matcol) rows.