Don't know how others view it but seems to me
that 200 obs
for what you are seeking to do doesn't make for good
regression
inferences....but your call.....best
wishes...
----- Original Message -----
Sent: Saturday, May 15, 2010 12:59
AM
Subject: [Gretl-users] creating ID
variables
Hi,
Suppose I have a data set of 200 cars where the
observation labels are
the make (Chevy, Honda, BMW, etc.). Say there
are 10 makes. I want to
create a variable, say ID, that identifies
the make so I don't have to
rely on the observation label. The
purpose is to later create dummies
for the makes to include in a
regression model and create boxplots (one
for each make's price, all shown
in one plot window) of price. How can
I do this? Or is it
better to just use the observation labels and
laboriously write if
statements?
Thanks,
Walt
________________________
Walter
R. Paczkowski, Ph.D.
Data Analytics Corp.
44 Hamilton
Lane
Plainsboro, NJ 08536
________________________
(V)
609-936-8999
(F) 609-936-3733
walt@dataanalyticscorp.com
www.dataanalyticscorp.com
_____________________________________________________
--
________________________
Walter R. Paczkowski, Ph.D.
Data
Analytics Corp.
44 Hamilton Lane
Plainsboro, NJ
08536
________________________
(V) 609-936-8999
(F)
609-936-3733
walt@dataanalyticscorp.com
www.dataanalyticscorp.com
_______________________________________________
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