Dear Perl Monks I am completely stumped by the following bug, I'm trying to return values from this subroutine, but inside the innermost for loop and outside of the triple loop, the @Azcord, @Axcord and @Aycord arrays are empty if you call it by index e.g  $Axcord[$counter] but if you call it by array e.g. @Axcord the entries will appear, which is no good for manipulation and which I can't pass back to the main programme?! does anyone have any idea of whats going on here? Many Thanks in advance! much appreciated! Dan 
sub coordinatesorter {

local (*Axcoord, *Aycoord, *Azcoord, *Bxcoord, *Bycoord, *Bzcoord, *re
+s_to_atom, *natres, $nseg, *beginning, *ending) = @_;

my @Axcord;
my @Aycord;
my @Azcord;
my @Bxcord;
my @Bycord;
my @Bzcord;
my $interdomaincounter=1;
my $counter = 0;

for ($iseg = 1; $iseg <= $nseg; ++$iseg){

  for ($ires = $beginning[$iseg]; $ires <= $ending[$iseg]; ++$ires) {

                for ($iat = 1; $iat <= $natres[$ires]; ++$iat) {

        $Axcord[$counter] = $Axcoord[$res_to_atom[$ires][$iat]];
        $Aycord[$counter] = $Aycoord[$res_to_atom[$ires][$iat]];
        $Azcord[$counter] = $Azcoord[$res_to_atom[$ires][$iat]];
        $Bxcord[$counter] = $Bxcoord[$res_to_atom[$ires][$iat]];
        $Bycord[$counter] = $Bycoord[$res_to_atom[$ires][$iat]];
        $Bzcord[$counter] = $Bzcoord[$res_to_atom[$ires][$iat]];

        $counter++;

        }
    }
}

return (\@Axcord, \@Aycord, \@Azcord, \@Bxcord, \@Bycord, \@Bzcord);

}

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In reply to Can call array but not index of an array in subroutine?! by fraizerangus

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