To make life easier for you I will post a piece of code in here. Earlier today I had to transpose a large text file so I blurted out this piece of code. (Takes the rows from a file and makes them into a column)

It is a rather stupid code. (I'm a noob). For example it would not be prudent to actually load all the file into an array, but better to do it line by line in a while($line=<>) loop. etc. But Being a rather stupid code it should also be quite readily understandable and demonstrates the idea of getting columns out from your lines pretty well.

 #!/usr/bin/perl -w
use strict;
use warnings; 
my @data=<>;
my @column=();
for (my $count=3;$count<=4215;$count++)
{
  foreach (@data)
  {
  my @row=split(/\t/, $_);
  push (@column,$row[$count]);
  }
print "@column\n";
@column=()
}

[download]

As you can see this piece of code was used to extract columns 3 to 4215. You only need to extract one single column right now. Enjoy!

In reply to Re^3: average a column in tab-delimited file by naturalsciences
in thread average a column in tab-delimited file by garyboyd

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