Dear Monkers: I am trying to input the following file
AA SET1 0
AA SET2 1
AA SET3 0
BB SET1 0
BB SET3 0
CC SET1 2
CC SET2 3
and print the following
NAME SET1 SET2 SET3
AA 0 1 0
BB 0 0
CC 2 3
My questions is that I am not able to get the right format for the output that I want. I created a 2D hash but got confused when I tried to print using "foreach". I have just started to learn perl and having trouble with printing hashes 

 
%hashname = ();
%hashlow = ();
%hashhigh = ();
open(INPUTL,"<$listfile") || die "Can't open \$listfile for reading.\n
+";
while($line=<INPUTL>){
    chomp $line;
    @toks = split(/\t/, $line);
    $dataset = $toks[0];
    $gene = $toks[1];
    $hashname{$dataset} = $dataset;
    $hashlow{$gene}{$dataset} = $toks[2]." ($toks[4])";
    $hashhigh{$gene}{$dataset} = $toks[3]." ($toks[4])";
}
close(INPUTL);
foreach $gene (sort keys %hashlow){
    if ($gene =~ /AA/){
       foreach $set (sort keys %{$hashlow{$gene}}){
         print OUTD2 NAME."\t".$set;
       }
    }
}
print "\n";
foreach $gene (sort keys %hashlow){
    print OUTD2 $gene."\t";
    foreach $set (sort keys %{$hashlow{$gene}}){
        print OUTD2 $hashlow{$gene}{$set}."\t";
    }
    print OUTD2 "\n";
}

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In reply to Using 2d hash to print a matrix by angerusso

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