Message-ID: <Pine.A41.4.58.0401221305000.12616@homer33.u.washington.edu>
Date: 2004-01-22T21:05:52Z
From: Thomas Lumley
Subject: lm function
In-Reply-To: <20040122203539.74269.qmail@web21502.mail.yahoo.com>
On Thu, 22 Jan 2004, jenny smith wrote:
> Hi, How can I extract the standard deviation of the coefficients when
> using the lm function. I know ____$coefficient gives me the individual
> betas. thank you
$coefficient is not the recommended way to get the coefficients.
use coef(your.model) for the coefficients and vcov(your.model) for their
variance matrix, so that sqrt(diag(vcov(your.model))) are the standard
errors.
-thomas
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Thomas Lumley Assoc. Professor, Biostatistics
tlumley at u.washington.edu University of Washington, Seattle