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Fill missing numbers in second column with zeros

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# 1  
Old 10-28-2011
Fill missing numbers in second column with zeros
Hi All,

I have 100 files with names like this:

1.dat, 2.dat, 3.dat until 100.dat.

My dat files look like this:

Code:
42323 0
438939 1
434 0
0.9383 
3434 
120.23 3
234

As you can see in the second column, some numbers are missing. I want to fill those missing places with 0's in all dat files. I am using Linux. This is what I expect:
Code:
42323 0
438939 1
434 0
0.9383 0
3434 0
120.23 3
234 0

# 2  
Old 10-28-2011
Try:
Code:
cp -ar DIR DIR-BAK
cd DIR
for f in *.dat; do
  awk 'NF == 1 { $2 = 0 }1' "$f" > ~temp
  mv ~temp "$f"
done

This User Gave Thanks to yazu For This Post:
shoaibjameel123
# 3  
Old 10-28-2011
Code:
awk '!$2{$2=0}1' inputfile

--ahamed

---------- Post updated at 07:49 PM ---------- Previous update was at 07:43 PM ----------

Code:
sed -i 's/^[0-9.]*[ ]*$/& 0/' *.dat

--ahamed
This User Gave Thanks to ahamed101 For This Post:
shoaibjameel123
# 4  
Old 10-29-2011
one more in nawk .. sample for one file ..
Code:
$ nawk '{if($2=="") {print $0,0} else {print $0}}' infile

This User Gave Thanks to jayan_jay For This Post:
shoaibjameel123
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