Setting a formula for GLM as a sum of columns in R

Question

I am trying to set the formula for GLM as the ensemble of columns in train - train$1:99:

model <- glm(train$100 ~ t         


        

Answer 1

The simplest way, assuming that you want to use all but column 100 as predictor variables, is

 model <- glm(v100 ~. , data = train, family = "binomial")

where v100 is the name of the 100th column (the name can't be 100 unless you have done something advanced/sneaky to subvert R's rules about data frame column names ...)