-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Manel Salamero
Sent: Sunday, August 14, 2005 12:34 PM
To: r-help at stat.math.ethz.ch
Subject: Re: [R] path analysis
This solves part of my problem with the independent ordinal
variables, but my dependent variable is truly categorial
(illness/no illness). Polychoric correlation implies that
data are continuous, which in not the case. Is possible to
implement logistic regression in the path model?
Thanks,
Manel Salamero
---------- Original Message ----------------------------------
De: "John Fox" <jfox at mcmaster.ca>
Data: Sat, 13 Aug 2005 19:35:24 -0400
Dear Manel,
-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of
MANUEL
Sent: Saturday, August 13, 2005 2:02 PM
To: r-help at stat.math.ethz.ch
Subject: [R] path analysis
Someone knows if it is possible to perform a path analysis with sem
package (or any other) to explain a dependent
*dichotomus* variable?
Yes -- you can use the hetcor() function in the polycor
package to generate
a correlation matrix and boot.sem() in the sem package to get standard
errors or confidence intervals. Make sure that the
dichotomous variables are
represented as factors. See ?boot.sem for an example.
I hope this helps,
John