Generate a diagonal matrix from the elements of another matrix

Good morning, I'm trying to generate a diagonal matrix with non-zero elemets from another matrix.

For example I have a general matrix like: (usually it's around 40x5)

A=[1 2 3 4 5;
    6 7 8 9 10];

I would like to generate a matrix with the elements of A on the diagonal, just like:

1 0 0 0 0 0 0 0 0 0

0 2 0 0 0 0 0 0 0 0

0 0 3 0 0 0 0 0 0 0

0 0 0 4 0 0 0 0 0 0

0 0 0 0 5 0 0 0 0 0

0 0 0 0 0 6 0 0 0 0

And so on untili 10.

Can someone help me?

Thanks in advance

Answer 1

[Akira Agata]

I would recommend using diag function.

The following is an example:

A = [1 2 3 4 5;
  6 7 8 9 10];

A = A';
output = diag(A(:));

>> output

output =

1 0 0 0 0 0 0 0 0 0

0 2 0 0 0 0 0 0 0 0

0 0 3 0 0 0 0 0 0 0

0 0 0 4 0 0 0 0 0 0

0 0 0 0 5 0 0 0 0 0

0 0 0 0 0 6 0 0 0 0

0 0 0 0 0 0 7 0 0 0

0 0 0 0 0 0 0 8 0 0

0 0 0 0 0 0 0 0 9 0

0 0 0 0 0 0 0 0 0 10

[Marco]

It works perfectly! Thanks and sorry for wasting your time on such an easy question.