insert a field into a tab delimited file


 
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# 1  
Old 06-19-2009
insert a field into a tab delimited file

Hello,

Can someone help me to do this with awk or sed? I have a file with multiple lines, each line has many fields separated with a tab. I would like to add one more field holding 'na' in between the first and second fields.

old file looks like,

1, field1 field2 field3 ...
2, field1 field2 field3 field4 ...
.
.

output:
1, field1 na field2 field3 ...
2, field1 na field2 field3 field4 ...
.
.

Many thanks
# 2  
Old 06-19-2009
Code:
nawk -F'\t' '{$2="na" OFS $2}1' OFS='\t' myFile

# 3  
Old 06-19-2009
use this:-

Code:
awk -F"\t" '(NF!=0){ $2=$2"\t""na" }1 ' input.txt

BR
# 4  
Old 06-19-2009
You guys are the best! Thank you so much.
# 5  
Old 06-19-2009
Quote:
Originally Posted by ahmad.diab
use this:-

Code:
awk -F"\t" '(NF!=0){ $2=$2"\t""na" }1 ' input.txt

BR
1-st and 2-nd - not 2-nd and 3-rd
# 6  
Old 06-19-2009
right, but deserve my many thanks too!
# 7  
Old 06-19-2009
Quote:
Originally Posted by ssshen
Hello,

Can someone help me to do this with awk or sed? I have a file with multiple lines, each line has many fields separated with a tab. I would like to add one more field holding 'na' in between the first and second fields.

old file looks like,

1, field1 field2 field3 ...
2, field1 field2 field3 field4 ...
.
.

output:
1, field1 na field2 field3 ...
2, field1 na field2 field3 field4 ...
.
.

Many thanks
Code:
guys in the out below it is between 2nd and 3rd not 1st and 2nd

1, field1 field2 field3 ...
2, field1 field2 field3 field4 ...
.
.

output:
1, field1 na field2 field3 ...
2, field1 na field2 field3 field4 ...

so my code is true.
awk -F"\t" '(NF!=0){ $2=$2"\t""na" }1 ' OFS="\t" input.txt

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