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Split one column into three with awk

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Name: mohairsam
Date: September 21, 2009 at 02:15:41 Pacific
OS: Linux i686
Product: Macmillan Linux for windows
Subcategory: Batch
Comment:

I want to convert

1
2
3
4
5
6
7
8
9

into

123
456
789

I've seen examples with awk using a[something]=a[something] but I can't make it work. Can anyone help please?



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Response Number 1
Name: nails
Date: September 21, 2009 at 07:49:43 Pacific
Reply:

One way is to use awk's modulo operator:

#!/bin/bash

awk ' {
if(NR % 3 == 0 )
   printf("%s\n", $0)
else
   printf("%s", $0)
} ' datafile.txt


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