Login or Register to Ask a Question and Join Our Community


UNIX for Dummies Questions & Answers

Dummy question on awk

 
Thread Tools Search this Thread
Top Forums UNIX for Dummies Questions & Answers Dummy question on awk
# 1  
Old 01-30-2015
Dummy question on awk
Hi,

I have a file which has three columns and 200 rows. I would like to print an extra column say "disco" for every 10 th row starting from 4 th row. How is that possible?

Thnx
# 2  
Old 01-30-2015
Try

Code:
awk  '{ if (NR==(4+10*b)) { print $0,"disco";b=b+1} else print }' file

# 3  
Old 01-30-2015
Hello Indra2011,

Following may also help you in same.
Code:
awk 'BEGIN{b=4}(NR==b){$0=$0 OFS "disco";b+=10} 1'  Input_file

Thanks,
R. Singh
# 4  
Old 01-30-2015
You could also try this slightly simpler awk script:
Code:
awk '(NR % 10) == 4 {$0 = $0 OFS "disco"} 1' file

This User Gave Thanks to Don Cragun For This Post:
rbatte1
# 5  
Old 02-02-2015
Thanks to all of u.
 
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

Dummy Question

Where can I get UNIX? (1 Reply)
Discussion started by: ciao303
1 Replies

2. IP Networking

DNS dummy question

Hello everyone, I have a some doubt about DNS. We have connected to 2 ISPs /ISP#1 and ISP#2/. Our web site's dns zone is located on ISP#1. If connection to ISP#1 is down clients won't find our website. ISP#1 connection went down few times this month. So we are going to create our website's... (0 Replies)
Discussion started by: sembii
0 Replies

3. UNIX for Dummies Questions & Answers

a dummy question on data processing

Hi, everyone, I have a matrix, let's say: 1 2 3 4 5 6 ... 4 5 6 7 8 9 ... 7 8 9 1 2 3 ... 3 4 5 6 7 8 ... ......... (nxm matrix) Is there a simple command that can take certain specific rows out of the matrix? e.g., I want to take row 2 (4 5 6 7 8 9 ...) and row 4 (3 4 5 6 7 8... (2 Replies)
Discussion started by: kaixinsjtu
2 Replies

4. UNIX for Dummies Questions & Answers

dummy question on data process

I have a file which contains 6 columns. But I only need the first 3 columns. So I need to remove the last 3 columns. I checked 'cut' but it seems not working. So is there a command that could remove certain columns from a file? :( Thanks a lot!! (5 Replies)
Discussion started by: kaixinsjtu
5 Replies

5. UNIX for Dummies Questions & Answers

a dummy question...needs help...

I am trying to use 'cut' to get a line from my file. But it seems that 'cut' recongnizes TAB as default. My file uses space instead. So 'cut' doesn't work. Anybody can tell me how to change the default from TAB to space ? Or how to transform a space-delimited file into tab-delimited file??... (2 Replies)
Discussion started by: kaixinsjtu
2 Replies

6. UNIX for Dummies Questions & Answers

Dummy question about /proc/cpuinfo

Perhaps this is a very dummy question but sorry I don't know other place to do it. We just buy a new cluster of Xeon machines but there is something I don't understand and perhaps someone can help me. The more /proc/cpuinfo produces the following output (just part of it). processor : 0... (1 Reply)
Discussion started by: jhc
1 Replies

7. UNIX for Dummies Questions & Answers

cut awk dummy question :)

how to make cut and awk treat "a b" as a single column rather then two separate columns "a and b"? how to remove " symbol from "a b" so there is only a b? Please help Regards Karol (14 Replies)
Discussion started by: sopel39
14 Replies

8. Filesystems, Disks and Memory

A simple dummy question

Hello Everyone! changing from Microsoft to Macintosh, I connected my hard disk (nearly full) to the apple computer, which could not recognize it. I was prompt to "initialize it", unfortunately I DECIDED YES!!, but just for 1/100 of a second: now I cannot access the hard disk at all. Is still... (1 Reply)
Discussion started by: NETTO68
1 Replies

9. UNIX for Dummies Questions & Answers

question from a dummy

okay so I just started this unix class and understood all the test questions but this "normal" question threy me through a loop :confused:. The question is Why are UNIX commands noninteractive and why is their output not usually preceededby header information? This question has been driving me... (2 Replies)
Discussion started by: cinnamonbear
2 Replies

10. UNIX for Dummies Questions & Answers

Unix dummy's question

:confused: Hi, 2 questions to get some insight. Thanks (1) I would like to add a prefix (XX00) in each row of the line in my text file and save a newly generated file another name. How to go about it. (2) How to insert a blank line into each row in my file. and save the file another name.... (2 Replies)
Discussion started by: merry susana
2 Replies
Login or Register to Ask a Question