how to extract the diagonal entries out of a matrix

[David Doria]

A = rand(3,3);
B = diag(A);

Dave

On Fri, Feb 6, 2009 at 1:01 PM, Edward <edatva at gmail.com> wrote:
> Hi,
>
> For example, there is a matrix like:
>
> [ 1 2 3 4
>   5 6 7 8
>   3 5 7 0
>   4 8 2 5 ]
> and I want to get the diagonal elements out of the matrix and make into a
> vector: [ 1 6 7 5]  .
>
> I know I could write some lines to do it, but I just want to know if there
> is a built-in function can do the job. Thank you.
>
> --
> Edward
>
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>



-- 
Thanks,

David