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st: customised output formats


From   "Daniel Exeter" <d.exeter@auckland.ac.nz>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: customised output formats
Date   Wed, 26 Mar 2008 16:37:01 +1300

Hi there 

I have the variables 
Pid, x, y, t, d

For 1000 participants, and there are many observations for each
participant. 

I'm using an archaic program that uses data in the format:

Pid
X,y
X,y
X,y
END
Pid
X,y
X,y
END 

And so on.

I would think that I need to : 

loop through for each pid
  identify the value of pid
  write this value to an outfile

 loop through all observations of current pid
  extract values for x and y
  write x and y values to outfile
 
write "end" into outfile

I tried this logic, but I can't seem to append info to the outfile...
any ideas?

Cheers
Dan


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