Hi,

I have four files to merge. There is no overlap between the IDs (4th column) in each of these files. I can utilize 'cat', but the header will be repeated. Any help would be appreciated.

data 
SP   GC DC  ID  Descr   GI Locus LF
cat Ts All 5320 CGA1   1892 L2   3.1
dog Ts Sp  6420 beta 1 1849 L3   4.2
------------------------------------

The format of the data is the same in the four files.

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I am trying to write a code for this. I was not sure whether to create a hash for this. I am pasting the code below that I wrote. The code is not complete. 

#!/usr/bin/perl -w
use strict;
use warnings;

my $infile1="file1.csv";
my $infile2="file2.csv";
my $infile3="file3.csv";
my $infile4="file4.csv";
open (my $in_fh1, "<", $infile1) or die "Can't open $infile1" ($!);
open (my $in_fh2, "<", $infile2) or die "Can't open $infile2" ($!);
open (my $in_fh3, "<", $infile3) or die "Can't open $infile3" ($!);
open (my $in_fh4, "<", $infile4) or die "Can't open $infile4" ($!);
open (my $out_fh, ">", "file1_4.csv");


while (defined(my $line1=<$in_fh1>) || defined (my $line2=<$in_fh2)|| 
+defined (my $line3=<$in_fh3)|| defined (my $line4=<$in_fh4)
      ){
    chomp $line1;
    $line1=~s/\t/,/g;
    my @columnheadings=split (/\t/, $line1);
    my $headings=join(",", @columnheadings);
     chomp $line2;
    $line2=~s/\t/,/g;
    chomp $line3;
    $line3=~s/\t/,/g;
    chomp $line4;
    $line4=~s/\t/,/g;
    print $out_fh "$headings\n";
}

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In reply to Merging multiple files by bluray

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