Been a while since I worked with RMS values, but from what I remember your code looks a little overcomplex. What's wrong with this:

sub rms {
  my $sq;

  $sq += $_ * $_ foreach @_;

  sqrt($sq/@_);
}

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In reply to Re: How do I get the root mean square of a list? by davorg
in thread How do I get the root mean square of a list? by larryk

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