Visit The New, Modern Unix Linux Community


Deleting columns from a space delimited text file


 
Thread Tools Search this Thread
Top Forums UNIX for Dummies Questions & Answers Deleting columns from a space delimited text file
# 1  
Deleting columns from a space delimited text file

I have a space delimited text file with 1,000,000+ columns and 100 rows. I want to delete columns 2 through 5 (2 and 5) included from the text file. How do I do that? Thanks.
# 2  
Code:
perl -pe 's/([^ ]+ +)([^ ]+ +){4}/\1/' file

PS. Did my code work for your previous request? (the one about columns starting with NA)

Last edited by bartus11; 05-31-2011 at 06:27 PM..
This User Gave Thanks to bartus11 For This Post:
# 3  
Yes, thank you very much! Smilie

---------- Post updated at 04:43 PM ---------- Previous update was at 04:24 PM ----------

How would I alter the code if I only want to delete columns 2 and 3?
# 4  
Code:
perl -pe 's/([^ ]+ +)([^ ]+ +){2}/\1/' file

 

Previous Thread | Next Thread
Thread Tools Search this Thread
Search this Thread:
Advanced Search

Test Your Knowledge in Computers #797
Difficulty: Easy
The simplest arithmetic operation in binary is addition.
True or False?

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Changing only the first space to a tab in a space delimited text file

Hi, I have a space delimited text file but I only want to change the first space to a tab and keep the rest of the spaces intact. How do I go about doing that? Thanks! (3 Replies)
Discussion started by: evelibertine
3 Replies

2. UNIX for Dummies Questions & Answers

Swap two rows in a space delimited text file?

Hi, How do you swap two rows in a space delimited text file? Thanks! (4 Replies)
Discussion started by: evelibertine
4 Replies

3. UNIX for Dummies Questions & Answers

Converting a text file with irregular spacing into a space delimited text file?

I have a text file with irregular spacing between values which makes it really difficult to manipulate. Is there an easy way to convert it into a space delimited text file so that all the spaces, double spaces, triple spaces, tabs between numbers are converted into spaces. The file looks like this:... (5 Replies)
Discussion started by: evelibertine
5 Replies

4. UNIX for Dummies Questions & Answers

Deleting lines that contain a specific string from a space delimited text file?

Hi, I have a space delimited text file that looks like the following: 250 rs10000056 0.04 0.0888 4 189321617 250 rs10000062 0.05 0.0435 4 5254744 250 rs10000064 0.02 0.2403 4 127809621 250 rs10000068 0.01 NA 250 rs1000007 0.00 0.9531 2 237752054 250 rs10000081 0.03 0.1400 4 17348363... (5 Replies)
Discussion started by: evelibertine
5 Replies

5. UNIX for Dummies Questions & Answers

Deleting columns from a tab delimited text file?

I have a tab limited text file with 10000+ columns. I want to delete columns 6 through 23, how do I go about doing that? Thanks! (1 Reply)
Discussion started by: evelibertine
1 Replies

6. UNIX for Dummies Questions & Answers

How do you view specific columns from a space delimited text file?

I have a space delimited text file with 1,000,000+ columns? I would only like to view specific ones (let's say through 1:10), how can I do that? Thanks! (3 Replies)
Discussion started by: evelibertine
3 Replies

7. UNIX for Dummies Questions & Answers

Deleting cells that contain a specific number only from a space delimited text file

I have this space delimited large text file with more than 1,000,000+ columns and about 100 rows. I want to delete all the cells that consist of just 2 (leave 2's that are not by themselves intact): File before modification aa bb cc 2 NA100 dd aa b1 c2 2 NA102 de File after modification... (1 Reply)
Discussion started by: evelibertine
1 Replies

8. Shell Programming and Scripting

replace 3rd field of space delimited text file

how to replace the 3rd colum? Each line begins similarly, but they all ends variously. XX YY 03 variable text here XX YY 03 more variable text here XX YY 03 even more variable text here really long setence XX YY 03 variable numbers also appear 03 11. 123 456 XX YY 03 the occasional comma,... (4 Replies)
Discussion started by: ajp7701
4 Replies

9. UNIX for Dummies Questions & Answers

How to convert text to columns in tab delimited text file

Hello Gurus, I have a text file containing nearly 12,000 tab delimited characters with 4000 rows. If the file size is small, excel can convert the text into coloumns. However, the file that I have is very big. Can some body help me in solving this problem? The input file example, ... (6 Replies)
Discussion started by: Unilearn
6 Replies

10. UNIX for Dummies Questions & Answers

Searching for text in a Space delimited File

Hi I am trying to search a firewall syslog space delimeted file for all of the different tcp and udp destination ports. I know that grep will find lines that contain specific text. And I have tried using the the the cut command to cut out of the file certain colums. However the test I am... (6 Replies)
Discussion started by: andyblaylock
6 Replies

Featured Tech Videos