For an interesting post by William Gould on precision see: http://www.stata.com/statalist/archive/2005-11/msg00104.html
-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands
visiting adress:
Buitenveldertselaan 3 (Metropolitan), room Z214
+31 20 5986715
http://home.fsw.vu.nl/m.buis/
-----------------------------------------
-----Original Message-----
From: [email protected] [mailto:[email protected]]On Behalf Of Maarten Buis
Sent: vrijdag 25 november 2005 10:59
To: [email protected]
Subject: st: RE: RE: RE: variable mean and r(mean), why do they differ?
Use -gen double varname = r(mean)- instead of -gen varname = r(mean)-. In my example the mean of price three deviates from zero in the fourteenth decimal place, which is as close to zero as you could hope to get in a normal computer program.
-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands
visiting adress:
Buitenveldertselaan 3 (Metropolitan), room Z214
+31 20 5986715
http://home.fsw.vu.nl/m.buis/
-----------------------------------------
-----Original Message-----
From: [email protected] [mailto:[email protected]]On Behalf Of Raoul C Reulen
Sent: vrijdag 25 november 2005 10:30
To: [email protected]
Subject: st: RE: RE: variable mean and r(mean), why do they differ?
Thanks Maarten,
In my analysis it does make a difference. I have to calculate numerous
mean values, sum them to obtain one variable and then I have to multiply
this by a large factor before I can use it. Any suggestions? Thanks
again.
Raoul
*
* 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/
