I'm not sure if I understood all your requirements, but here is some WORKING code to get you started. 
#!/usr/bin/perl
use strict;
use warnings;

#https://perlmonks.org/?node_id=1230556

#Normal open & process Input file would be
#    open my $inp, "<", "Inp-file-name";
#    while (<$inp>){
#       .. process One record , now located in $_
#    }
#    close $inp;

my @New_file = ( # This tracks info for each output file 
    {FILENAME=>"File-for-col1.txt", FH=>undef},
    {FILENAME=>"File-for-col2.txt", FH=>undef},
);

for my $file(@New_file){
       open $file->{FH}, ">", $file->{FILENAME} 
              or die "ERROR: Cannot open $file->{FILENAME}: $!";
}

while (<DATA>){
    my ($header, @columns) = split ;
    print "DEBUG: hdr=$header .. got ", scalar (@columns), " columns\n
+";
    
    my $col_idx=0;
    for my $file(@New_file){
       print {$file->{FH}} $columns[$col_idx],"\n";
       $col_idx++;
    }
}

for my $file(@New_file){
       close  $file->{FH};
}

__DATA__
MT-TA    5.36272153463324    21.4508861385329    8.04408230194985    3
+4.857689975116    0    0    0    13.4068038365831
MT-TC    24.1322469058496    160.881646038997    48.2644938116991    3
+7.5390507424327    45.5831330443825    0    0    104.573069925348
MT-TD    10.7254430692665    10.7254430692665    0    2.68136076731662
+    0    176.969810642897    1.34068038365831    445.105887374559

[download]

                As a computer, I find your faith in technology amusing.

In reply to Re: General Help/Advice Needed by NetWallah
in thread General Help/Advice Needed by PandaRaey

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