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Dividing one file into several files

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# 1  
Old 11-26-2012
Dividing one file into several files
Hello,

I am using Awk in UBUNTU 12.04.

I have a file as follows, the first column represents the name of populations, in my real file, I have 47 populations and 2172 lines in total with about 47000 fields.
Code:
ABO_1 1 2
ABO_1 1 2
ABO_2 1 1
GPO_1 1 1
GPO_1 2 2
GPO_2 1 0
GPO_2 2 0

I want to separate each population into different files, that is for this example to produce 2 files:
Code:
First file:
ABO_1 1 2
ABO_2 1 1

Code:
Second file:
GPO_1 1 1
GPO_1 2 2
GPO_2 1 0
GPO_2 2 0

thank you very much.
# 2  
Old 11-26-2012
Homework?
# 3  
Old 11-26-2012
No, but I found it out. I just use pattern detection, takes longer but it's OK.
# 4  
Old 11-26-2012
Quote:
Originally Posted by Homa
No, but I found it out. I just use pattern detection, takes longer but it's OK.
Can you show your solution?
Not sure if its same as this one

Code:
awk -F_ '{print > $1}' file

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