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Date:         Tue, 7 May 2002 14:16:24 -0700
Reply-To:     prasad.s.ravi@HOUSEHOLD.COM
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         Prasad Ravi <prasad.s.ravi@HOUSEHOLD.COM>
Subject:      Re: PROC GAM
Comments: To: Sean Kuo <kuo@STAT.UIOWA.EDU>
Content-type: text/plain; charset=us-ascii

Have you tried using GCV (Generalized Cross Validation) option for more objective DF as

PROC GAM DATA=test; MODEL Y = SPLINE(X) /method=GCV; RUN;

Prasad Ravi

Sean Kuo To: SAS-L@LISTSERV.UGA.EDU <kuo@STAT.UIOWA.E cc: DU> Subject: PROC GAM Sent by: "SAS(r) Discussion" <SAS-L@LISTSERV.U GA.EDU>

05/07/2002 12:07 PM Please respond to Sean Kuo

Hi,

I have question about setting the df in PROC GAM. The data set has 8425 obs with only x and y variables. The code is

PROC GAM DATA=test; MODEL Y = SPLINE(X, DF=12) ; RUN;

However, the output returned a df=20.368164 instead of 12 as I've seen in some other examples. The other question is what is the common setting for df. Any suggestion will be appreciated. Thanks!

--Sean


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