These code lines: 
    $aa->[0] = my $one;
    $aa->[1] = my $two;
    $aa->[2] = my $three;

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are obviously wrong, because $one, $two and $three have not been initialized, and also because a my is usually applying on a L-value or left-hand side of an assignment (although there are a few specific cases where it can apply to a R-value). I am not sure of what you are trying to achieve, but it seems likely that you are really trying to do something like: 
my $one = $aa->[0];
# ...

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I am also not sure that you really need Math::Vector::Real for what you intend to do. Using core arrays and possibly arrayrefs should be sufficient.

Please explain in more details what you are trying to do.

In reply to Re: How to vector by Laurent_R
in thread How to vector by jcklasseter

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