Hi, I have two files with a great deal of data. The two files have a common alpha-numeric field and one of the files has a numeric field that is associated with the common alpha-numeric field. I would like to search the file with both values and return a version of the file missing the numeric field that has the numeric field and the alpha-numeric field. Each number corresponds to a particular alpha-numeric field. I cannot figure out how to make this happen. I have tried splitting the arrays and comparing the two with an if statement but I either get no results or undesirable ones. Would someone be able to help me with this? Thank you so much in advance. Also, this is the code that I tried. Sorry that I didn't include it earlier. It obviously has some problems. I'm just not sure how to go about correcting them. 

!#/usr/bin/perl -w

open (IN, "C:/work/job2/Ab2SigmaGene.txt");

while (<IN>){ #start while loop
      chomp;
      @t=split(/\t/,$_);
      $t[4]= $AB{[4]};
}  #end while loop

close IN;

open (OUT, ">C:/work/job2/XP725a.txt");                
open (IN, "c:/work/job2/XP725_Ab_array.txt");

while (<IN>){  #start
      chomp;
      @var1=split(/\t/,$_);
      
      if ($var1[2] and exists $Ab{$var1[2]}){
      print OUT "$var1[0]\t$var1[1]\t$var1[2]\t$AB[4]\n";}
      
      }   #end
close IN;
close OUT;

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In reply to Compare Arrays, Return Values by de2425

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