On Nov 16, 2009, at 2:22 PM, Jack Luo wrote:
Hi,
I am trying to fit a logistic regression using glm, but my explanatory
variables are of mixed type: some are numeric, some are ordinal,
some are
categorical, say
If x1 is numeric, x2 is ordinal, x3 is categorical, is the following
formula
OK?
The formula's certainly "OK". What may be non-OK will be your
understanding of the output. The default handling of ordinal factors
is a common source of questions to R-help, so read up first.
*model <- glm(y~x1+x2+x3, family=binomial(link="logit"),
na.action=na.pass)*
Why have you chosen that na.action option?
--
David Winsemius, MD
Heritage Laboratories
West Hartford, CT
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
