Message-ID: <Pine.LNX.4.44.0401230715540.24629-100000@gannet.stats>
Date: 2004-01-23T07:19:48Z
From: Brian Ripley
Subject: getting confidence intervals after lm fitting
In-Reply-To: <019d01c3e140$13bdd3b0$983991d8@jungdm>
On Thu, 22 Jan 2004, Yun-Fang Juan wrote:
> After fitting with lm, I want to get the 95 % confidence intervals of the
> expected predicted value.
Of the predicted expected value, I assume?
> I know in S-plus I can use pointwise() to get the confidence intervals .
> But in R, I couldn't find such a function.
> Is there any R package available for such functionalities.
No, but predict() in R does this for you. See ?predict.lm .
--
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595