what is i(class =1) in logistic regression what is the function of class i(class = 1). in a logistic regression r collapsing categorical variable what is the glm function in logistic regression how do you use categorical variable collapsing? what is a categorical variable in r what is the class of a categorical variable in r how do you combine categorical variable in regression test r collapsing categorical variable r collapsing categorical variable what is the name of the categorical variable in r can categorical data be recoded what is the glm function in r collapsing categorical variables in logistic regression how to collapse categorical data in r r collapsing categorical data example which r variable can you combine with a class variable? r create a function to recode categorical data what is the method for collapsing categorical data in r combining categorical variables in logistic regression