Date: Wed, 6 Sep 2006 22:44:40 -0700
Reply-To: David L Cassell <davidlcassell@MSN.COM>
Sender: "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From: David L Cassell <davidlcassell@MSN.COM>
Subject: Re: proc loes and binary depedent variable
Content-Type: text/plain; format=flowed
> Is there any one in the list, who has an example for using proc loess
>with binary dependent variable and one or multiple independent variables?
> Many thanks
I would not recommend LOESS for a binary dependent variable.
LOESS can certainly handle multivariate data. But the fit is done
as a weighted least squares model of linear and/or quadratic forms
of the regressors. So using it as is, on categorical data, is not the
Instead, I would look into PROC GAM. It can fit splines and
other nonparametric models, as well as semi-parametric models
and parametric models, and it can fit them to binary dependent
But if you fit a complex nonparametric model to your data,
will you be able to answer the hypotheses you had originally?
David L. Cassell
3115 NW Norwood Pl.
Corvallis OR 97330
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