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st: RE: RE: Loess confidence bands

From   "Anderson, Bradley J" <>
To   <>
Subject   st: RE: RE: Loess confidence bands
Date   Wed, 7 Mar 2007 13:18:15 -0500

John Fox gives a strategy for calculating what he calls a "pointwise 95% confidence envelope."  Reference follows:

John Fox (2000).  Nonparametric Simple Regression: Smooothing Scatterplots.  Quantitative Applications in the Social Sciences, 07-130.  Sage Publications.

-----Original Message-----
[]On Behalf Of Nick Cox
Sent: Wednesday, March 07, 2007 11:55 AM
Subject: st: RE: Loess confidence bands

I don't know about -loess-. That would presumably
a privately available user-written analogue of -lowess-. 

Be that as it may, -lowess- doesn't support confidence 
bands. Is anyone aware that they are even defined in the literature?


Paswel Phiri Marenya

> How do I get confidence bands around my loess graphs? i.e
> loess y x (what else do I need to do to show confidence band 
> on the plot?)

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