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Re: st: Troubleshooting comparison of means across groups


From   Maarten Buis <maartenlbuis@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Troubleshooting comparison of means across groups
Date   Thu, 28 Jun 2012 16:18:29 +0200

On Thu, Jun 28, 2012 at 4:12 PM, Kerry MacQuarrie wrote:
> If I run the code ttest varname by(groupvar), I get: "factor variables and
> time-series operators not allowed".

You forgot the comma between varname and by(). -by()- is an option, so
it has to appear after the comma.

-- Maarten

--------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany


http://www.maartenbuis.nl
--------------------------
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