grabbing specific column perl


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting grabbing specific column perl
# 1  
Old 05-26-2009
grabbing specific column perl

Alright,

I'm new to Perl so be gentle. Given the following script:
----
open(file, "<file.txt");

@lines = <file>;
close(file);

$var = print $lines[18];
----

So I'm printing line 18 of the file "file.txt". I now want the 5th column, minus the forward slash. The line looks like this:

TUV 1/ 3.2/ 4.5/ 3.1/

I tried doing:

print $var | perl -pae '$_="$F[5]\n"';, but i get garbage.

thanks in advance.
# 2  
Old 05-27-2009
you are calling perl again inside your perl script. if you want to remove the slash, use s///g syntax.
check perldoc perlretut
# 3  
Old 06-01-2009
not helpful

okay that post was not helpful in the least. I understand not to include perl in the string, I meant to take it out. any other help out there?
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Using awk to change a specific column and in a specific row

I am trying to change the number in bold to 2400 01,000300032,193631306,190619,0640,1,80,,2/ 02,193631306,000300032,1,190618,0640,CAD,2/ I'm not sure if sed or awk is the answer. I was going to use sed and do a character count up to that point, but that column directly before 0640 might... (8 Replies)
Discussion started by: juggernautjoee
8 Replies

2. Shell Programming and Scripting

Overwrite specific column in xml file with the specific column from adjacent line

I have an xml file dumped from rrd file, that I want to "patch" so the xml file doesn't contain any blank hole in the resulting graph of the rrd file. Here is the file. <!-- 2015-10-12 14:00:00 WIB / 1444633200 --> <row><v> 4.0419731265e+07 </v><v> 4.5045912770e+06... (2 Replies)
Discussion started by: rk4k
2 Replies

3. Shell Programming and Scripting

How to print multiple specific column after a specific word?

Hello.... Pls help me (and sorry my english) :) So I have a file (test.txt) with 1 long line.... for example: isgc jsfh udgf osff 8462 error iwzr 653 idchisfb isfbisfb sihfjfeb isfhsi gcz eifh How to print after the "error" word the 2nd 4th 5th and 7th word?? output well be: 653 isfbisfb... (2 Replies)
Discussion started by: marvinandco
2 Replies

4. Shell Programming and Scripting

Converting Single Column into Multiple rows, but with strings to specific tab column

Dear fellows, I need your help. I'm trying to write a script to convert a single column into multiple rows. But it need to recognize the beginning of the string and set it to its specific Column number. Each Line (loop) begins with digit (RANGE). At this moment it's kind of working, but it... (6 Replies)
Discussion started by: AK47
6 Replies

5. Shell Programming and Scripting

Grabbing fields with perl

I have several .csv files containing data like this: field_1;field_2;date;comment;amount; I want to extract the 3 last fields and load them in a database. my input_file = "/dir/file.csv"; my output_file = "/dir/file.sql"; open my $csv_file, '<', $input_file or die "Can't... (1 Reply)
Discussion started by: freddie50
1 Replies

6. Shell Programming and Scripting

Count specific characters at specific column positions

Hi all, I need help. I have an input text file (input.txt) like this: 21 GTGCAACACCGTCTTGAGAGG 50 21 GACCGAGACAGAATGAAAATC 73 21 CGGGTCTGTAGTAGCAAACGC 108 21 CGAAAAATGAACCCCTTTATC 220 21 CGTGATCCTGTTGAAGGGTCG 259 Now I need to count A/T/G/C numbers at each character location in column... (2 Replies)
Discussion started by: thienxho
2 Replies

7. Shell Programming and Scripting

Grabbing web forms with Perl

Hello Everyone, I've googled everywhere for this with no luck and my brain hurts. I'm trying to write a program to take my webpages and search for forms. I've used LWP::Simple to store a website in $content I need to cut the form out of $content. I don't know how to do this seeing as how... (2 Replies)
Discussion started by: wibbs
2 Replies

8. Shell Programming and Scripting

parsing filename and grabbing specific string patterns

Hi guys...Wow I just composed a huge post and it got erased as I was logged out automatically Anyways I hope someone can help me out here. So the task I'm working on is like this I have a bunch of files that I care about sitting in a directory say $HOME/files Now my job is to go and loop... (6 Replies)
Discussion started by: rukasetsuna
6 Replies

9. Shell Programming and Scripting

Assigning a specific format to a specific column in a text file using awk and printf

Hi, I have the following text file: 8 T1mapping_flip02 ok 128 108 30 1 665000-000008-000001.dcm 9 T1mapping_flip05 ok 128 108 30 1 665000-000009-000001.dcm 10 T1mapping_flip10 ok 128 108 30 1 665000-000010-000001.dcm 11 T1mapping_flip15 ok 128 108 30... (2 Replies)
Discussion started by: goodbenito
2 Replies

10. Shell Programming and Scripting

Insert a text from a specific row into a specific column using SED or AWK

Hi, I am having trouble converting a text file. I have been working for this whole day now, still i couldn't make it. Here is how the text file looks: _______________________________________________________ DEVICE STATUS INFORMATION FOR LOCATION 1: OPER STATES: Disabled E:Enabled ... (5 Replies)
Discussion started by: Issemael
5 Replies
Login or Register to Ask a Question