Extract data with awk and write to several files


 
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# 1  
Old 03-20-2011
Extract data with awk and write to several files

Hi!

I have one file with data that looks like this:

1 data data data data
2 data data data data
3 data data data data
.
.
.
1 data data data data
2 data data data data
3 data data data data
.
.
.

I would like to have awk to write each block to a separate file, like this:

1 data data data data
2 data data data data
3 data data data data
.
.
.

To filename.1, the other block to filename.2 etc

How many blocks there are will not be constant.

So awk will write to one file until $1 is equal to 1, and then write to another file until $1 is equal to 1 again etc.

I was thinking about using while, but I can't wrap my head around it..
Is there someone who could enlighten me ?

Thanks.

Martin.
# 2  
Old 03-20-2011
Try:
Code:
awk 'BEGIN{x=0}$1==1{x+=1}{print $0 >"filename."x;}' file


Last edited by bartus11; 03-20-2011 at 10:59 AM..
This User Gave Thanks to bartus11 For This Post:
# 3  
Old 03-20-2011
Code:
awk '$1==1{x++}{print >> ("filename"x)}' file

This User Gave Thanks to danmero For This Post:
# 4  
Old 03-20-2011
Thanks guys !
Your one-liners is doing what I wanted.

Awk really is a powerful tool Smilie

Martin.
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