100来个患者，比如分性别、年龄、吸烟（二分类）、饮酒等判断疾病有无（分类），100例数据，就出来两个。

二分类赋值：factor(x <- c(Pathology), levels <- c(0, 1), labels = levels, exclude = NA, ordered = is.ordered(Pathology), nmax = NA)

[1] <NA> <NA>

Levels: 0 1

哪位大佬指导一下

factor(x <- c(data$Pathology), levels <- c(0, 1), labels = levels, exclude = NA, ordered = is.ordered(Pathology), nmax = 100)

这样也不行！！$符合不能兼容，太难了