HOW CAN CREATE A MATRIX FROM A SINGLE ROW?

I have 12 elements distributed on a single row, i've to put them on a 3x4 matrix, how i do that?

Answer 1

[Arif Hoq]

use reshape function.

A=randi(100,1,12)

A = 1×12

99 27 87 54 85 99 10 14 94 9 80 42

output=reshape(A,3,4)

output = 3×4

99 54 10 9 27 85 14 80 87 99 94 42

[John D'Errico]

With only the caveat that the solution offerd by @Arif Hoq puts the elements into the matrix going down the columns. If @simone zappalà wanted to put the elements going across rows from the original vector, then this subtle change would do the trick:

A = [99    27    87    54    85    99    10    14    94     9    80    42];
output=reshape(A,4,3).'

output = 3×4

99 27 87 54 85 99 10 14 94 9 80 42