[R] Analysis of ordinal categorical data

[thsudler@swissonline.ch]

Hi

I would like to analyse an ordinal categorical variable. I know how I can analyse a nominal categorical variable (with multinom or if there are only two levels with glm).

Does somebody know which command I need in R to analyse an ordinal categorical variable?

I want to describe the variable y with the variables x1,x2,x3 and x4. So my model looks like: y ~ x1+x2+x3+x4.

y: ordinal factor variable with levels (never, rare, bychance, often).

Thanks a lot in advance
Thomas