How to (n)awk lines of CSV with certain number of fields?


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting How to (n)awk lines of CSV with certain number of fields?
# 1  
Old 04-07-2010
How to (n)awk lines of CSV with certain number of fields?

I have a CSV file with a variable number of fields per record. How do I print lines of a certain number of fields only? Several permutations of the following (including the use of escape characters) have failed to retrieve the line I'm after (1,2,3,4)...

Code:
$ cat myfile
1,2,3,4
1,2,3
$ # Print lines made from ((one or more non commas followed by a comma) x 3)
$ nawk '/([^,]*,){3}/' myfile
$

Any ideas? Thanks in advance...

---------- Post updated at 02:48 PM ---------- Previous update was at 02:42 PM ----------

Doh!

Solution:
Code:
$ nawk -F, 'NF == 4' myfile
1,2,3,4

# 2  
Old 04-07-2010
Please try with this

awk -F"," ' NF == 4 {print }' myfile

I think this should work.Smilie
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

awk to combine lines if fields match in lines

In the awk below, what I am attempting to do is check each line in the tab-delimeted input, which has ~20 lines in it, for a keyword SVTYPE=Fusion. If the keyword is found I am splitting $3 using the . (dot) and reading the portion before and after the dot in an array a. If it does have that... (12 Replies)
Discussion started by: cmccabe
12 Replies

2. UNIX for Beginners Questions & Answers

How to count lines of CSV file where 2 fields match variables?

I'm trying to use awk to count the occurrences of two matching fields of a CSV file. For instance, for data that looks like this... Joe,Blue,Yes,No,High Mike,Blue,Yes,Yes,Low Joe,Red,No,No,Low Joe,Red,Yes,Yes,Low I've been trying to use code like this... countvar=`awk ' $2~/$color/... (4 Replies)
Discussion started by: nmoore2843
4 Replies

3. Shell Programming and Scripting

Awk: Combine multiple lines based on number of fields

If a file has following kind of data, comma delimited 1,2,3,4 1 1 1,2,3,4 1,2 2 2,3,4 My required output must have only 4 columns with comma delimited 1,2,3,4 111,2,3,4 1,222,3,4 I have tried many awk command using ORS="" but couldnt progress (10 Replies)
Discussion started by: mdkm
10 Replies

4. Shell Programming and Scripting

[ksh88 and awk] Number of fields with a value.

Hi, With: # VALUES="one~two~~~" # echo $VALUES | awk 'BEGIN {FS="~"} {print NF}' 5 I can determine the number of fields. How to determine the number of fields with a value ? In this case 2. Thanks in advance, ejdv (6 Replies)
Discussion started by: ejdv
6 Replies

5. Shell Programming and Scripting

awk split lines without knowing the number of fields a-priori

I want to use awk to split fields and put them into a file but I don't know the number of fields for example, in the following line Ports: 22/filtered/tcp//ssh///, 53/open/tcp//tcpwrapped///, 111/filtered/tcp//rpcbind///, 543/filtered/tcp//klogin///, 544/filtered/tcp//kshell///,... (3 Replies)
Discussion started by: esolvepolito
3 Replies

6. Shell Programming and Scripting

Comparing two csv file fields using awk script

Hi All, I want to remove the rows from File1.csv by comparing the columns/fields in the File2.csv. I only need the records whose first column is same and the second column is different for the same record in both files.Here is an example on what I need. File1.csv: RAJAK|ACTIVE|1... (2 Replies)
Discussion started by: rajak.net
2 Replies

7. Shell Programming and Scripting

CSV to SQL insert: Awk for strings with multiple lines in csv

Hi Fellows, I have been struggling to fix an issue in csv records to compose sql statements and have been really losing sleep over it. Here is the problem: I have csv files in the following pipe-delimited format: Column1|Column2|Column3|Column4|NEWLINE Address Type|some descriptive... (4 Replies)
Discussion started by: khayal
4 Replies

8. Shell Programming and Scripting

split a csv file into specified number of files (not lines)

hi, i really need it ...it's not simple to explain but as it's part of a crontab i can't split the file manually...and the file can change every day so the lines are not a good base. example: how to split 1 csv file in 15 files? thank you very much regards :b: (4 Replies)
Discussion started by: 7stars
4 Replies

9. Shell Programming and Scripting

awk sed cut? to rearrange random number of fields into 3 fields

I'm working on formatting some attendance data to meet a vendors requirements to upload to their system. With some help on the forums here, I have the data close. But they've since changed what they want. The vendor wants me to submit three fields to them. Field 1 is the studentid field,... (4 Replies)
Discussion started by: axo959
4 Replies

10. Shell Programming and Scripting

Re-usable function to parse csv files with different number of fields

Hi there, been pondering how to deal with this and hoping someone would give me an insight on this. I need help on creating a reusable bash funtion to parse csv files containing different number of fields (comma-seperated). My initial thought is to create function for each input csv file (20+... (2 Replies)
Discussion started by: jy2k7ca
2 Replies
Login or Register to Ask a Question

Featured Tech Videos