Visit Our UNIX and Linux User Community


Deleting every 3rd field using awk


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Deleting every 3rd field using awk
# 1  
Old 10-14-2009
Deleting every 3rd field using awk

I have a file whose format is like the following

Code:
350,2,16.2,195,2,8.0

every 3rd column of this file should be deleted. How can i achieve this

tried with the following

Code:
 iostat -D -l 2 | /usr/xpg4/bin/awk ' NR>2 { for (i=0;i<=NF;i++)if(i%3==0)$i=""};'

but no luck
# 2  
Old 10-14-2009
Code:
awk -F"," '{print $1","$2","$4","$5","$6}' a.txt >> newfile.txt

# 3  
Old 10-14-2009
Code:
echo "A,B,-,C,D,-,E,F"| awk -F"," '{for(i=1; i<=NF; i++){if( i%3 ){print $i}}}'
A
B
C
D
E
F

# 4  
Old 10-14-2009
Another approach:

Code:
awk -F, '{$3="";sub(",,",",")}1' OFS=","


Previous Thread | Next Thread
Test Your Knowledge in Computers #589
Difficulty: Medium
A binary search algorithm requires that the array being searched is sorted in descending order.
True or False?

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

How to add subtotal and total according 3rd field mentioned below table?

111AKKK|SHA|20|25 111|AKKK|SHA|15|35 112|ABC|FL|25|45 112|ABC|FL|15|15 115|AKKK|ASH|10|15 115|AKKK|ASH|20|20 112|ABC|FL|25|20 115|AKKK|ASH|30|35 111|AKKK|SHA|10|45 112|ABC|KL|15|15 112|ABC|KL|20|25 115|AKKK|ASH|30|35 please write a shell script output should be below mentioned... (26 Replies)
Discussion started by: udhal
26 Replies

2. Solaris

3rd field in /etc/shadow

Searched and searched, but could not find a official answer. In Solaris, on a new server build, all the system accounts look like this: # cat /etc/shadow root:#########:6445:::::: daemon:NP:6445:::::: bin:NP:6445:::::: sys:NP:6445:::::: adm:NP:6445:::::: lp:NP:6445::::::... (6 Replies)
Discussion started by: flyddw
6 Replies

3. Shell Programming and Scripting

Deleting only 2nd and third duplicates in field 2

(7 Replies)
Discussion started by: newbie2010
7 Replies

4. Shell Programming and Scripting

awk to compare 2nd and 3rd field and print the differences

need a one liner to compare 2nd and 3rd field and print values that are not matched in 2nd field Input col 2 col 3 1.1.1.1 11.11.11.11 8.8.8.8 0.0.0.0 3.3.3.3 2.2.2.2 7.7.7.7 3.3.3.3 5.5.5.5 1.1.1.1 4.4.4.4 6.6.6.6 9.9.9.9 output 7.7.7.7 ... (12 Replies)
Discussion started by: chidori
12 Replies

5. Shell Programming and Scripting

only print line if 3rd field is 01

Similar question... I have a space delimited text file and I want to only print the lines where the 3rd word/field/column is equal to "01" awk '{if $3 = "01" print $0}' something like this. I meant to say: only print line IF 3rd field is 01 (2 Replies)
Discussion started by: ajp7701
2 Replies

6. 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

7. Shell Programming and Scripting

print the last line of an recurring pattern on the 3rd field

How can i awk/sed to print the last line of an recurring pattern on the 3rd field? Input lines: 123456.1 12 1357911 11111.1 01 123456.2 12 1357911 11111.2 02 123456.3 12 1357911 11111.3 03 123456.4 12 1357911 11111.4 04 123456.5 12 1357911 11111.5 05 246810.1 12 1357911 22222.1 01... (4 Replies)
Discussion started by: ux4me
4 Replies

8. Shell Programming and Scripting

Format the file by deleting empty field

I have the test data with 10 column separated by comma and each column has more than 1000000 rows. Can anyone help me to find empty field in all columns and delete that empty field alone and lift that column up by one row. Data with empty field: A74203XYZ,A21718XYZ,A72011XYZ,A41095XYZ,... (7 Replies)
Discussion started by: zooby
7 Replies

9. Shell Programming and Scripting

Extract Part of string from 3rd field $3 using AWK

I'm executing "wc -lc" command in a c shell script to get record count and byte counts and writing them to a file. I get the result with the full pathname of the file. But I do not want the path name to be printed in the output file. I heard that using Awk we can get this but I don't have any... (4 Replies)
Discussion started by: stakuri
4 Replies

10. UNIX for Dummies Questions & Answers

deleting records with a missing field

I had to delete rows when a record was missing a field. My solution was cut -c 202-402 ${dataFile} | awk '{if (substr($0,103,30) !~ /^ *$/) print $0} >> ${workFile} The cut is because they came two records to a row. Anyone want to offer a more elegant solution? (2 Replies)
Discussion started by: gillbates
2 Replies

Featured Tech Videos