Thanks!!!! It works fine now and, as you said, substantially faster also.
This is what I did,
foreach my $pair (@lpairs) {
my $n = 0;
my $z = 0;
my $hl;
my $pvalue = 0;
my $pvt = 0;
my $fk;
foreach $fk (%ipairs) {
if( exists $ipairs{$fk} && exists $ipairs{$fk}{$pair} && exi
+sts $ipairs{$fk}{$pair}{'pvalue'}){
#if($ipairs{$fk}{$pair}{'pvalue'}){
$pvt = $ipairs{$fk}{$pair}{'pvalue'};
if($pvt){
unless($hl){
$hl = $ipairs{$fk}{$pair}{'head'};
}
$n++;
$z+= qnorm($ipairs{$fk}{$pair}{'pvalue'});
}
}
}
if($n>2){
$z = $z/sqrt($n);
$pvalue = pnorm($z);
}
if ($pvalue) {
#printf "$pair -> %.4f\n", $pvalue;
printf OF "$hl %.4f $n\n", $pvalue;
}
}
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