Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

grep on columns

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting grep on columns
# 1  
Old 05-29-2012
grep on columns
Hi,


my data is this way

Code:
abc def 01000000 kil
ghi 23 01000000 kim
ghj 0000 01000000 omg

now, I would like to replace 01000000 on the third column as 0.

I have a file with that value in different columns. So, any awk one liner that can let me change the column $ value would be highly appreciated.

TIA
# 2  
Old 05-29-2012
awk lets you assign columns by writing to them. Also, any variable can be used as a column with $ since it's an operator. It's just that easy.

Code:
awk '{ for(N=1; N<=NF; N++) if($N == "01000000") $N="0" } 1'

This User Gave Thanks to Corona688 For This Post:
jacobs.smith
# 3  
Old 05-29-2012
Quote:
Originally Posted by Corona688
awk lets you assign columns by writing to them. Also, any variable can be used as a column with $ since it's an operator. It's just that easy.

Code:
awk '{ for(N=1; N<=NF; N++) if($N == "01000000") $N="0" } 1'

Hi Corona,

Thanks for ur timely response and great explanation.

The output is not tab separated. How do I do that?
# 4  
Old 05-29-2012
Quote:
Originally Posted by jacobs.smith
Hi Corona,

Thanks for ur timely response and great explanation.

The output is not tab separated. How do I do that?
Code:
awk 'BEGIN{OFS="\t"}{ for(N=1; N<=NF; N++) if($N == "01000000") $N="0" } 1'

or even shorter if "01000000" is always on 3rd column
Code:
awk 'BEGIN{OFS="\t"}{ if($3 == "01000000") $3="0" } 1'

This User Gave Thanks to sdf For This Post:
jacobs.smith
# 5  
Old 05-29-2012
Quote:
Originally Posted by sdf
Code:
awk 'BEGIN{OFS="\t"}{ for(N=1; N<=NF; N++) if($N == "01000000") $N="0" } 1'

or even shorter if "01000000" is always on 3rd column
Code:
awk 'BEGIN{OFS="\t"}{ if($3 == "01000000") $3="0" } 1'


Life made simple.

Thanks to unix.com
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Grep in specific columns

I am trying to search a list of strings from a file and display the string as well as the column in the search file it was found. I dont care about the row. what is wrong with my script? while read line; do awk -v var="$line" '{for(i=1;i<NF;i++) if ($NF==$var) break; print $var FS $NF' }'... (3 Replies)
Discussion started by: senhia83
3 Replies

2. Shell Programming and Scripting

Grep in multiple columns

Hi All, One of my source file is having more than 100 columns. Now, I need to check the particular string in 75th,76th and 79th columns of the source file. If I find the particular string in above mentioned columns, then I need to print the entire record with line number. Kindly help... (2 Replies)
Discussion started by: suresh_target
2 Replies

3. UNIX for Dummies Questions & Answers

Grep into columns

Hi folks, hopefully an easy one .... I've got a hefty patching project going on on Solaris 8 boxes..... I'm trying to make a spreadsheet with the current packages, revision , description, patches etc I'd like to put the information output from pkginfo into columns... so eg :- system ... (3 Replies)
Discussion started by: Martincorneuk
3 Replies

4. Shell Programming and Scripting

Grep and print only certain columns from a row

Hi Friends, This is my input chr1 100 200 + gene_name "alpha"; protein_name "alpha"; level 2; tag "basic"; info "known"; chr1 245 290 + gene_name "alpha-1"; protein_name "alpha-2"; level 9; tag "basic"; info "uknown"; chr1 310 320 + gene_name "alpha"; protein_name "alpha-4"; level 2; info... (3 Replies)
Discussion started by: jacobs.smith
3 Replies

5. Shell Programming and Scripting

Grep and convert into columns

I have 1000 different autosys jobs, want to extract only this information using unix commands. Tried with normail greping but unable to make columns into rows. Input: /* ----------------- template ----------------- */ insert_job: template job_type: c box_name: box1 command:... (3 Replies)
Discussion started by: onesuri
3 Replies

6. UNIX for Dummies Questions & Answers

grep only from a range of columns

Hello all, I have a .csv file with over 100 columns. I would like to grep for a pattern only searching within a range of those fields, and print the entire line. For example: grep a pattern from columns $47-$87, but print fields $0 - $100 Thanks! (9 Replies)
Discussion started by: torchij
9 Replies

7. Shell Programming and Scripting

Grep based on specific columns.

Hi, How can I grep a record for a value based on specific column. If I simply do a grep 'AB' FilenName.txt, I might end up getting the records returned whose part of value is 'AB'. But I want it specific to second column. cut -d'|' -f 2 FileName.txt | grep 'AB' But now it will return... (1 Reply)
Discussion started by: deepakwins
1 Replies

8. Shell Programming and Scripting

grep required data from two columns

hello, I have output from a command and I need to filter some info out of that. I tried awk command but I can not grep what I am looking for: Following is the output and I need to capture "disabled" for each volume from first column and report: # vol status Volume State ... (2 Replies)
Discussion started by: za_7565
2 Replies

9. UNIX for Advanced & Expert Users

Grep all the columns based on a particular column

This is the data file that I have 21879, 0, 22, 58, 388 0, -1, 300, 1219172589765, 1708, 0, 200, 21891, 0, 0, 33, 309 0, -1, 300, 1219172591478, 1768, 0, 200, 22505, 0, 0, 33, 339 0, -1, 300, 1219172593251, 1738, 0, 200, 21888, 0, 1, 33, 308 0, -1, 300, 1219172594995, 633, 0, 200, 24878,... (2 Replies)
Discussion started by: pmallur
2 Replies

10. UNIX for Dummies Questions & Answers

using Grep for only a certain number of columns

I am given a file with a list of names for the first 20 characters. The 20 characters after is a list of names that somebody is supposed to team up with. Now i'm trying to write a simple script that will read a name somebody inputs and then looks only in the first 20 characters. For example.... (2 Replies)
Discussion started by: MaestroRage
2 Replies
Login or Register to Ask a Question