Login or Register to Ask a Question and Join Our Community


UNIX for Dummies Questions & Answers

Remove a newline char from selected rows.

 
Thread Tools Search this Thread
Top Forums UNIX for Dummies Questions & Answers Remove a newline char from selected rows.
# 1  
Old 02-02-2012
Remove a newline char from selected rows.
Greetings!

Can we automate the process of removing a newline char from selected rows in a fixed width file using a shell?
Input is like
Code:
abcd1234
xyzd1234
abcd
a1b2c3d4
abcd1234
xyzd1234
xx
abcd1234

Expected output -
Code:
abcd1234xyzd1234
abcda1b2c3d4abcd1234xyzd1234
xxabcd1234

Note - its like if in above case no of characters in a line -eq 9 (including new line char) remove newline char else not.

Appreciate your help!
Last edited by Franklin52; 02-03-2012 at 02:18 PM.. Reason: Please use code tags for data and code samples, thank you
# 2  
Old 02-02-2012
Hi mailme0205,

I think there are some solutions similar in this forum, but try with this:
Code:
$ cat infile
abcd1234
xyzd1234
abcd
a1b2c3d4
abcd1234
xyzd1234
xx
abcd1234
$ perl -pe 'chomp; printf qq[\n] if length != 8; END { printf qq[\n] }' infile
abcd1234xyzd1234
abcda1b2c3d4abcd1234xyzd1234
xxabcd1234

Regards,
Birei
# 3  
Old 02-02-2012
And an awk:
Code:
awk 'END{print RS} length!=8{print RS}1' ORS= infile

And some awks can do:
Code:
awk 'END{print RS} NF!=8{print RS}1' FS= ORS= infile

 
Login or Register to Ask a Question

Previous Thread | Next Thread

9 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Remove newline char from variable

I have a file ABC.DAT with 2 columns avaialble Data format : XYZ!$#$!120 XXZ!$#$!1000 YYZ!$#$!104 While running the following code : FILE_COUNTER=1; RECORD_CN_FILE_COUNT=$((`wc -l ABC.DAT| cut -f1 -d' '`)); while do FILE_NAME=`cat ABC.DAT.DAT| head -$FILE_COUNTER |tail -1 | awk -F... (1 Reply)
Discussion started by: Nikhil Gautam
1 Replies

2. Shell Programming and Scripting

To extract selected rows

Hi, I have two files Input1.txt and Input2.txt and i need to have a output with selected lines starting with the values present in Input2.txt. For example: Input1.txt:... (5 Replies)
Discussion started by: bhas
5 Replies

3. Shell Programming and Scripting

Shell to remove a newline char from selected rows in a file.

Greetings! Can we automate the process of removing a newline char from selected rows in a fixed width file using a shell? Input is like abcd1234 xyzd1234 abcd a1b2c3d4 abcd1234 xyzd1234 xx abcd1234 Expected output - abcd1234xyzd1234 abcda1b2c3d4abcd1234xyzd1234 xxabcd1234 ... (3 Replies)
Discussion started by: mailme0205
3 Replies

4. Shell Programming and Scripting

Help substituting text in a file having a single line but no newline char

Hello, Need help substituting a particular word in a file having a single line but no newline character at the end. I was trying to use sed but it doesn't work probably because there is no newline char at the end of the line. $ cat hlq_detail /outputs/alvan23/PDFs/bills $ cat... (5 Replies)
Discussion started by: Shan_u2005
5 Replies

5. Shell Programming and Scripting

SED: Place char at starting and replace selected line

Hello Experts, I am working on a small file editing script. Since all experts here are very generous to give me the complete code, I would take up the problem in steps so that I ensure my opportunity to learn. AIM: The script has some commented and some uncommented lines. I need to : ... (2 Replies)
Discussion started by: hkansal
2 Replies

6. Shell Programming and Scripting

Splitting a variable based on newline char

Heeloo all, A weird problem perhaps. May god save others from this problem. I want to print each line from a variable.. the example below should make it clear. smvar="Hello World1 Hello world 2 forgot there I guess" for eachline in $smvar echo $eachline end Whats for... (3 Replies)
Discussion started by: pavanlimo
3 Replies

7. Shell Programming and Scripting

Need to print only selected char in a string..?

Hi, I want to print particular chars in a string. for example ie., consider " dear,. roopa$#09%~`';']" as the example string. Here, I want to print only alphanumeric chars.. suppose , if i want only alphanumeric... value would be "dear roopa09" suppose , if i want some spl char(,) with... (2 Replies)
Discussion started by: balan_mca
2 Replies

8. Shell Programming and Scripting

How to replace any char with newline char.

Hi, How to replace any character in a file with a newline character using sed .. Ex: To replace ',' with newline Input: abcd,efgh,ijkl,mnop Output: abcd efgh ijkl mnop Thnx in advance. Regards, Sasidhar (5 Replies)
Discussion started by: mightysam
5 Replies

9. Shell Programming and Scripting

print selected rows with awk

Hi everybody: Could anybody tell me how I can print from a file a selected rows with awk. In my case I only want print in another file all the rows from NR=8 to NR=2459 and the increment each 8 times. I tried to this: awk '{for (i=8; i=2459; i+=8); NR==i}' file1 > file2 But doesn't... (6 Replies)
Discussion started by: tonet
6 Replies
Login or Register to Ask a Question