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Replace with NA if blank is there

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# 1  
Old 12-16-2012
Replace with NA if blank is there
Hi All,

please help me below request.



i am having a file XXXX.dat. in Unix.

example-
Code:
plan_dk,imsmodelvar,paymt_type_az,mmars_plan,mmars_payer,mmars_pbm,account,botpbm,formulary_Crestor
0000000000,,3,MAIL ORDER,MAIL ORDER DATA,N/A,MAIL ORDER,N/A,
0000000000,6,,MAIL ORDER,MAIL ORDER DATA,N/A,MAIL ORDER,N/A,
0000000000,,,MAIL ORDER,MAIL ORDER DATA,N/A,MAIL ORDER,N/A,


in above lines 1st line is header (column names) and below are the values.
my requirement is --> if only 2nd and 3rd columns value are Null then it should replace with NA.Another columns value should not be changed keep as it is.
how to do in unix either command or a shell script.


Result should look like below mentioned.
Code:
0000000000,NA,3,MAIL ORDER,MAIL ORDER DATA,N/A,MAIL ORDER,N/A,
0000000000,6,NA,MAIL ORDER,MAIL ORDER DATA,N/A,MAIL ORDER,N/A,
0000000000,NA,NA,MAIL ORDER,MAIL ORDER DATA,N/A,MAIL ORDER,N/A,

Advance Thanks...

Thanks,
Krupa
Last edited by Scott; 12-16-2012 at 07:59 AM.. Reason: Please use code tags and less formatting
# 2  
Old 12-16-2012
Try:
Code:
awk -F, -vOFS=, '{$2=$2!=""?$2:"NA";$3=$3!=""?$3:"NA"}1' file.dat

This User Gave Thanks to bartus11 For This Post:
krupasindhu18
# 3  
Old 12-16-2012
A solution 4 characters shorter than bartus11's:
Code:
awk -F, -vOFS=, '{$2=$2""?$2:"NA";$3=$3""?$3:"NA"}1' file.dat

This might not work with some old awk implementations.
This User Gave Thanks to elixir_sinari For This Post:
krupasindhu18
# 4  
Old 12-16-2012
Thanks

it's working now
# 5  
Old 12-16-2012
One char shorter than elixir_sinari's:
Code:
awk -F, -vOFS=, '!($2""){$2="NA"}!($3""){$3="NA"}1' file

or, even 2 chars less
Code:
awk -F, -vOFS=, '$2==""{$2="NA"}$3==""{$3="NA"}1' file

This User Gave Thanks to RudiC For This Post:
krupasindhu18
# 6  
Old 12-16-2012
How about this one?
Code:
awk '!$2{$2="n/a"}!$3{$3="n/a"}1' FS=, OFS=, file

Did I win the contest of who has the shortest? ^_^
This User Gave Thanks to ripat For This Post:
krupasindhu18
# 7  
Old 12-16-2012
Quote:
Originally Posted by ripat
How about this one?
Code:
awk '!$2{$2="n/a"}!$3{$3="n/a"}1' FS=, OFS=, file

Did I win the contest of who has the shortest? ^_^
A 0 (zero) shouldn't replaced by n/a IMHO.
This User Gave Thanks to Franklin52 For This Post:
krupasindhu18
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