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Add Empty columns at the end of csv file

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# 1  
Old 05-12-2010
Add Empty columns at the end of csv file
Hi,

Can you please tell me how to add empty columns at the end csv file?

Currently there are 6 columns in the csv file. I want to add 35 empty columns at the end of this csv file.

Thanks,
Tushar
# 2  
Old 05-12-2010
Assuming the columns are comma separated:
Code:
awk -F, '{NF=41}1' OFS="," file > newfile

# 3  
Old 05-12-2010
something like this:

Code:
 
awk -F"," 'BEGIN{a="";for(i=1;i<=35;i++){a=" ,"a}} { print $0","a}' input_file

# 4  
Old 05-12-2010
Thanks for your reply. The command is adding empty columns at the end, after adding a New lline character. I want this in single row itself.

Could you please help me in this?
# 5  
Old 05-12-2010
Quote:
Originally Posted by Tushar Bendale
Thanks for your reply. The command is adding empty columns at the end, after adding a New lline character. I want this in single row itself.

Could you please help me in this?
I don't see any problem with the command, this is what I get:
Code:
$ cat file
1,2,3,4,5,6
1,2,3,4,5,6
1,2,3,4,5,6
1,2,3,4,5,6
$ awk -F, '{NF=41}1' OFS="," file
1,2,3,4,5,6,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
1,2,3,4,5,6,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
1,2,3,4,5,6,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
1,2,3,4,5,6,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

# 6  
Old 05-12-2010
Franklin,

Strange but i did not get the expected output with the command you suggested:

Code:
 
TES>cat rem
1,2,3,4,5,6
1,2,3,4,5,6
1,2,3,4,5,6
1,2,3,4,5,6
 
TEST>awk -F, '{NF=41}1' OFS="," rem
1,2,3,4,5,6
1,2,3,4,5,6
1,2,3,4,5,6
1,2,3,4,5,6

My OS is

Code:
 
HP-UX avalon B.11.11 U 9000/800 3547052374 unlimited-user license

# 7  
Old 05-12-2010
The standard does not require recomputation of $0 when NF is assigned. However, it does if you assign to a field beyond NF (which also recomputes NF). Instead, try:
Code:
awk -F, '{$41=""}1' OFS="," file

I believe that should work with posix-compliant awks.

Regards,
Alister
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