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...
Dr RJF Hudson Qld Australia rjfhud(a)powerup.com.au ----- Original Message ----- From: Data Analytics Corp. To: gretl-users(a)lists.wfu.edu 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(a)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(a)dataanalyticscorp.com www.dataanalyticscorp.com _______________________________________________ Gretl-users mailing list Gretl-users(a)lists.wfu.edu http://lists.wfu.edu/mailman/listinfo/gretl-users
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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...
|
