http://www.perlmonks.org?node_id=483450


in reply to Arrgghh! Perl and Matlab (round 2)

There's an easier way to create your $Sqs matrix. I tried this with your example and the suggestion by ambrus about matrix multiplication, and it worked. 
$Sqs = zeroes($V);
$Sqs->diagonal(0,1) .= $S;

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Re^2: Arrgghh! Perl and Matlab (round 2)
by ambrus (Abbot) on Aug 13, 2005 at 13:31 UTC

    There's an even easier way: 

    $Sqs = stretcher($S);

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    see PDL::MatrixOps.
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