Date: Wed, 30 Nov 2005 11:13:30 -0500
Reply-To: Wensui Liu <liuwensui@GMAIL.COM>
Sender: "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From: Wensui Liu <liuwensui@GMAIL.COM>
Subject: Re: multiregression question
Content-Type: text/plain; charset=ISO-8859-1
if you have a regression model y = f(x1, x2). then the simple scatter plots
will be y*x1for x1 and y*x2 for x2 and partial plots will be y-f(x1)*x2 for
x2 and y-f(x2)*x1 for x1.
On 11/30/05, lixiaoyao <firstname.lastname@example.org> wrote:
> Hi all
> I want to do a multiple regression,I read the link
> how to test the nonlinearity,they show me a simple regression,and they
> This section has shown how you can use scatterplots to diagnose
> problems of non-linearity, both by looking at the scatterplots of the
> predictor and outcome variable, as well as by examining the residuals
> by predicted values. These examples have focused on simple regression;
> however, similar techniques would be useful in multiple regression.
> However, when using multiple regression, it would be more useful to
> examine partial regression plots instead of the simple scatterplots
> between the predictor variables and the outcome variable.
> I do not understand "what is the partial regression plots instead of
> the simple scatterplots between the predictor variables and the outcome
> Can anyone explain this more to me or give me a detail link?
> Thank you for your time!
Senior Decision Support Analyst
Health Policy and Clinical Effectiveness
Cincinnati Children Hospital Medical Center