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    <p>Specifying comments for each line to give you clear understanding</p> <pre><code>#!/usr/bin/perl -w use strict; use warnings; my $infile = "Lab1_table.txt"; # input file path open INFILE, $infile or die "Can't open $infile: $!"; # input file opened my $outfile = "Lab1_tableoutput.txt"; # output file path open OUTFILE, "&gt;$outfile" or die "Cannot open $outfile: $!"; # output file opened my $count = 0; # count variable to check for header row in file my @header = (); # variable to store headers/column names of file my @average = (); # variable to store average calculated for each column while (&lt;INFILE&gt;) { chomp; my @columns = split /\s+/; # \s stands for [\ \t\r\n\f] $count++; if ( $count == 1 ) { @header = @columns; # executed only once for header } else { # else column executed for remaining rows for( my $i = 1; $i &lt; scalar @columns; $i++ ) { # $i=1 means skip first column $average[$i] += $columns[$i]; # calcuate average for each row } } } for( my $i = 1; $i &lt; scalar @average; $i++ ) { print OUTFILE $average[$i]/($count-1), "\n"; # This will write to output file } close OUTFILE; </code></pre> <p>Use <code>print OUTFILE $average[$i]/($count-1), "\n";</code> to write to file.</p> <p>Error <code>Argument "" isn't numeric in addition (+) at line 25, &lt;INFILE&gt; line X</code> could be if values in columns which you are adding,by any chance has string in it and not number.Check your input file.</p> <p>Note: I am not getting above error.Script runs smooth with above data.However if I change one of number to string,I get this error. </p>
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    1. POWhy do I see no computed results in my output file?
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    1. This table or related slice is empty.
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    1. COThere may be 2 tabs separating the retrovirus and genome, (first and second), columns. This would create another column to sum whose values are the empty string, "". This may be the problem he's seeing.
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      1. USChris Charley
    2. COHis code splits on a single tab where your code splits on \s+
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      1. USChris Charley
    3. CO@ChrisCharley- There is no space in the data i.e numbers/header names.Hence we can use `\s+` for tab.If you want you can also use `\t`.
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      1. This table or related slice is empty.
 

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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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