There's not really such thing as a 2d array in Perl. You have arrays of references to arrays, so $data[$i] is a reference to an array.

If you'd normally use @array, the reference equivalent is @{ $aref }, as per References Quick Reference. Therefore, you want 

push @{ $data[$i] }, $norm;

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or simply 

$data[$i][3] = $norm;

[download]

In reply to Re: pushing multidimensional arrays by ikegami
in thread pushing multidimensional arrays by afalsename

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