fitting a logistic regression with mixed type of variables
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