This should do it: 

# Test me - i do not have the data.
my $string;

for (7..13) {
  next unless defined $peaks[$_];
  $string = join ' ', $string, $peak[$_];
}

push @points, $string;

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--tidiness is the memory loss of environmental mnemonics

In reply to Re: 'defined' function by EvdB
in thread 'defined' function by Anonymous Monk

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