Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

AWK scripting

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting AWK scripting
# 1  
Old 11-26-2008
AWK scripting
I have a text file in which the text has been divided into paragraphs (two line breaks or tab marks a new paragraph) and I want to make a script which output would delete line breaks within the paragraph and the different paragraphs would be separated by two line breaks.

So, if my input file is:

Code:
     The first line.
Second line.

First line of the second paragraph.
Second line of the second paragraph.

I want the output to be something like:
Code:
The first line. Second line.

First line of the second paragraph. Second line of the second paragraph.

I have tried now for some hours to come up with something reasonable, but I seem to be heading the wrong way. I would be really pleased if someone gave their idea of how to solve the problem.

Thanks!
# 2  
Old 11-26-2008
Code:
#  paste - - - <infile | sed G
     The first line.    Second line.

First line of the second paragraph.     Second line of the second paragraph.

# 3  
Old 11-26-2008
or in nawk:

Code:
# nawk 'NR%3 {printf "%s ", $0;next}1(NR+1)%3{print"\n"}' infile
     The first line. Second line.

First line of the second paragraph. Second line of the second paragraph.

# 4  
Old 11-26-2008
And what if the paragraph is more than 2 lines long?
Code:
nawk 'BEGIN {FS=RS=""; ORS="\n\n\n"} $1=$1' infile

# 5  
Old 11-29-2008
The output of Tytalus' code is pretty much what needed, but yes, I want it to work with paragraphs longer than 2 lines as well. But I really didn't understand the code itself very well to change it properly. Could someone explain it a bit or give ideas of how to change it?
# 6  
Old 11-29-2008
Quote:
Originally Posted by Muki101
The output of Tytalus' code is pretty much what needed, but yes, I want it to work with paragraphs longer than 2 lines as well. But I really didn't understand the code itself very well to change it properly. Could someone explain it a bit or give ideas of how to change it?
Have you tried my suggestion?
# 7  
Old 11-29-2008
vgersh99, with your solution I get this:

Code:
$ nawk 'BEGIN {FS=RS=""; ORS="\n\n\n"} $1=$1' file
          T h e   f i r s t   l i n e .
 S e c o n d   l i n e .


F i r s t   l i n e   o f   t h e   s e c o n d   p a r a g r a p h .
 S e c o n d   l i n e   o f   t h e   s e c o n d   p a r a g r a p h .

Set the record separators to 2 newlines:

Code:
$ awk 'BEGIN {RS=ORS="\n\n"} $1=$1' file
The first line. Second line.

First line of the second paragraph. Second line of the second paragraph.

Regards
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

New at scripting awk with variable

I am trying to write a shell script that will add a date to and awk command from the command prompt. here is the line I am having difficulties. zgrep -i playback $dir/$1-*-errors.out.gz |cut -d '|' -f 1,11,12,15 | awk -v start=${start} -v end=${end} -F '|' '{$1>=start && $1 <=end} {print $2... (7 Replies)
Discussion started by: infinity0880
7 Replies

2. Shell Programming and Scripting

awk Scripting

Hey guys, I want to get all the columns in this input file tab-delimited, i need to get the column send them to a variable. From there i could print them in shuffle and pick and select columns i want. Here is the input sample 2013/08/05 06:50:38:067 MINOR SiteScope ... (9 Replies)
Discussion started by: ryandegreat25
9 Replies

3. Shell Programming and Scripting

Need help in awk scripting

Hi I am beginner of shell/AWK scripting , can you please help me in select particular column and column between two pattern from a multiple column file. file1.txt number status date1 date2 description category ... (7 Replies)
Discussion started by: vijay_rajni
7 Replies

4. Shell Programming and Scripting

Need help with awk scripting

hi all, I am working on awk scripting.I have created two awk files and now have a requirement of replacing the contents of first file with some contents of second file. Please find below the two files created.File1 has 3 records and File2 has 4 records. cat File1 111,0165,CB21031251,0165,... (3 Replies)
Discussion started by: csrohit
3 Replies

5. Shell Programming and Scripting

Help with AWK and Scripting!

Hi, This is the first time I am working with awk and I am not familiar with any commands in it. But I managed to do most of my work just left with one more. Needing your help! I have to extract only the matrix (written within ) from a text file. For example: 1JTJ_0006_ACGC_NPNP_A_12_15.pdb ... (17 Replies)
Discussion started by: SriJit
17 Replies

6. Shell Programming and Scripting

Need help with awk scripting.

Hi, i am newbie to this site and hope to learn but problem is s but need help urgently. Plz pm me if you are good at this. Help will be appreciated. (11 Replies)
Discussion started by: Rookie80
11 Replies

7. Shell Programming and Scripting

scripting/awk help : awk sum output is not comming in regular format. Pls advise.

Hi Experts, I am adding a column of numbers with awk , however not getting correct output: # awk '{sum+=$1} END {print sum}' datafile 2.15291e+06 How can I getthe output like : 2152910 Thank you.. # awk '{sum+=$1} END {print sum}' datafile 2.15079e+06 (3 Replies)
Discussion started by: rveri
3 Replies

8. Shell Programming and Scripting

awk scripting

Hi I have 2 files of large size( 10 Miilions) , i want to join 2 files based on some condition . for this taking lot of time and 100 cpu .i want to iterate the based on some value (like 1 lakh) I put the 2 files in the associative arrays . if the array limit reaches the 1 lach join the with... (2 Replies)
Discussion started by: kiranmosarla
2 Replies

9. Shell Programming and Scripting

Scripting via awk

Hi, I am trying to understand what is happening here, new to scripting: I have a couple of these, but if I knew what was going on in one I can figure out the rest: awk '/rpc-100083/ { $2 = "enable -r" } $3 ~ /.NOS99dtlogin/ { $t = $2; $2 = $3; $3 = $t } { print }' /var/svc/profile/upgrade... (2 Replies)
Discussion started by: ulemsee
2 Replies

10. UNIX for Dummies Questions & Answers

Awk scripting

Hi, I'm new to unix and i am kind of familiar with the basic commands. can anyone suggest some good books especially for AWK scripting and SHELL scripting thanks, Hari (2 Replies)
Discussion started by: rharee
2 Replies
Login or Register to Ask a Question