Solved

Counting values in a list 2

Posted on 2013-11-17
2
205 Views
Last Modified: 2013-11-17
I know very little about PERL :(

I have list of millions of rows of data. All data values are separated by a comma

I have to count how many rows contain a specific data value

for example

101,102,143,145,146,149
101,102,143,145,147,148
101,102,143,145,147,149
101,102,143,145,148,149
101,102,143,146,147,148
101,102,143,146,147,149
101,103,143,146,148,149
101,103,143,147,148,149
101,103,144,145,146,147
102,104,144,145,146,148
102,104,144,145,146,149
102,104,144,145,147,148

from that sample list, I have to count how many rows have the value 103 for the second data entry, so for this list the number of rows with 103 in the second data entry would be 3

Could someone help me with a PERL script that I can run as a .pl file and will

1. open the file  (filename:  master.vim )
2. Count through all the rows and record the number of rows with the value at that data point - in the second column
3. write the recorded number of rows to another file (  count103.txt  )
4. close master.vim and count.txt

Thankyou very much in advance
0
Comment
Question by:MichaelGlancy
2 Comments
 
LVL 14

Accepted Solution

by:
jb1dev earned 500 total points
ID: 39654944
#!/usr/bin/perl

open FILE, "<master.vim";
my $count = 0;

while(<FILE>) {
    my @columns = split(',');
    if($columns[1] eq '103') {
        $count++;
    }
}
close FILE;

open OUT, ">count.txt";
print OUT "$count\n";
close OUT;

Open in new window

0
 

Author Closing Comment

by:MichaelGlancy
ID: 39654961
great thanks
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This is an explanation of a simple data model to help parse a JSON feed
Computer science students often experience many of the same frustrations when going through their engineering courses. This article presents seven tips I found useful when completing a bachelors and masters degree in computing which I believe may he…
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…
With the power of JIRA, there's an unlimited number of ways you can customize it, use it and benefit from it. With that in mind, there's bound to be things that I wasn't able to cover in this course. With this summary we'll look at some places to go…

911 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

22 Experts available now in Live!

Get 1:1 Help Now