410234198 发表于 2013-5-22 15:56 
{MASS}包中的polr这个函数可以试试,适用于定序的。
这个函数的参数怎么写?哪个参数体现三分类和定序的?
function (formula, data, weights, start, ..., subset, na.action,
contrasts = NULL, Hess = FALSE, model = TRUE, method = c("logistic",
"probit", "cloglog", "cauchit"))