
From  "Michael Blasnik" <michael.blasnik@verizon.net> 
To  <statalist@hsphsun2.harvard.edu> 
Subject  Re: st: eliminate oppositie positive and negative values 
Date  Thu, 29 Mar 2007 08:32:41 0400 
On 29 Márta 2007, at 02:41, sara borelli wrote:doesn't that mean that the charges for a given date should sum to zero?I need to drop the negatives and the positives with the same date abs(charge) abs(xm) proc personid. As suggested by Michael Blasnik in a previous email I runned the following:
If that's the case then can't you just sum the charges within each person within each date and check if they are zero?
* * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/
© Copyright 1996–2016 StataCorp LP  Terms of use  Privacy  Contact us  What's new  Site index 