Insert Columns before the last Column based on the Count of Delimiters

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# 1  
Old 08-22-2014
Insert Columns before the last Column based on the Count of Delimiters


I have a requirement where in I need to insert delimiters before the last column of the total delimiters is less than a specified number.

Say if the delimiters is less than 139, I need to insert 2 columns ( with blanks) before the last field
awk -F '' '{ if (NF-1 < 139)} END { "Insert 2 columns before the last Field" }' File.txt

Last edited by bartus11; 08-22-2014 at 01:43 PM.. Reason: Please use [code][/code] tags.
# 2  
Old 08-22-2014
Try (untested):
awk -F 'NF < 140 {NF+=2; $NF=$(NF-2);$(NF-2)=""}' file

This would add two columns even if there's just e.g. three of them. Is that what you want?
# 3  
Old 08-22-2014

Thanks for the reply..

I have tried that but it isn't working.

My requirement is certain records in my file have 139 columns and few others 137. For all the records which have 137 columns , I need to add 2 columns before the last column so that the total count becomes 139
# 4  
Old 08-22-2014
awk 'NF<c{n=NF; $c=$n; $n=x}1' c=139 FS= OFS= file

# 5  
Old 08-22-2014
I have executed the command on the file, but when i count the delimiters i still get 138 and 139.Earlier it ised to be 137 and 139.

Ideally I should be getting one sinle value of the delimiters :139.

Also could yo ulet me know the fuctionality of the commad you used.

Many Thanks
# 6  
Old 08-22-2014
c (139) is the number of columns. To get 139 delimiters use c=140 instead of c=139..
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