st: Accessing the number of changes made by a "replace" command

["David Fisher" <djfisher81@msn.com>]

Hi all,
I am attempting to create a "while" loop that executes, amongst other 
things, a "replace" command on a particular variable.  I would like this 
loop to continue until the "replace" command cannot make any more changes to 
the data.  In order to do this I would like to be able to access the number 
of (real) changes made by the "replace" command, so that I can say something 
like "loop while (number of real changes)!=0".  Is there a way to do this in 
Stata?  I thought there might be an underscore variable that would do this, 
but I can't find one.
Thanks!
David Fisher.


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