create a new file from data file from a column

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# 1  
Old 06-14-2011
create a new file from data file from a column

I have a data file that has a list of data macthing by user.
I am able to sort by user and there is multiple rows for each user.

Ideally I would like to email only the user of the files they own. Would it be best to create a seperate file by user and all rows showing the files they own?
# 2  
Old 06-14-2011
Assuming you have the users in the 1st field:
awk '{close($1);print > $1}' file

# 3  
Old 06-14-2011
It would be better if you posted the input file and the output you expect.
# 4  
Old 06-14-2011
input data file
user1  file1.txt  %datecreated%  file_size
user1  file2.txt  %datecreated%  file_size
user1  file3.txt  %datecreated%  file_size
user2  file4.txt  %datecreated%  file_size
user2  file5.txt  %datecreated%  file_size
user3  file6.txt  %datecreated%  file_size
user4  file7.txt  %datecreated%  file_size
user4  file8.txt  %datecreated%  file_size

I would need a seperate data file by user and in the data file listing the files associated with them from the input file.

file1.txt  %datecreated%  file_size
file2.txt  %datecreated%  file_size
file3.txt  %datecreated%  file_size

# 5  
Old 06-14-2011
awk '{close($1 ".txt");print $2,$3,$4 > $1 ".txt"}' datafile

Last edited by Franklin52; 06-14-2011 at 04:43 PM.. Reason: typo
# 6  
Old 06-14-2011
I think close() needs nawk.
# 7  
Old 06-14-2011
awk -F\ \  '{f=$1 ".txt";close(f);sub($1FS,x);print >> f}' file

awk --version
awk version 20070501 (FreeBSD)

same for
awk --version
GNU Awk 3.1.3
Copyright (C) 1989, 1991-2003 Free Software Foundation.

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