Hello. I have a text file(tab-delim) with some as shown below.

ID SAMPLE_NAME EFFECTS SIZE

001 U7654 NEGATIVE 5.666

002 U7345 POSITIVE 4.333

003 U7674 NEGATIVE 1.696

002 U7845 POSITIVE -4.333

I am trying to get the sample name and size columns. Here is what I used. 
 
#!usr/bin/perl -w
use strict;

# open the file that has to be read
open(my $in, "filename.txt");
#open a new file which has to be made
open (my $out, ">result.txt");

#In the while loop, put the columns that have to be printed in the new
+ file.
while(<$in>){
my @fields = split /\t/;
    
    my $SAMPLE_NAME  = $fields[1];
    
        my $SIZE = $fields[3];
    #print the columns     
    {
        print $out "$SAMPLE_NAME\ $SIZE\n";
        }
        }
        
        close the filehandles
close($in);
close($out);

[download]
-----

Output I get:
SAMPLE_NAME SIZE
001


clearly this is not right. First I get the column heading but not the values and then I get the first value of the ID column. Can someone see what is going on?
How do I extract only the values which are greater than 2.0 and less than 5.0 from the size column?

In reply to extracting columns by perllearner007

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