如何从R中的glm函数结果中获取因变量名？

Question

I have r code of GLM created by one of my ex colleague. The code looks like

 glm_mod <- glm(formula
           , data
           ,weights=sqrt(units_x+units_y)
           ,family = quasibinomial(link="logit")

Formula defined the relationship between dependent & independent variable. I found there is an issue in formula. It's using incorrect dependent variable but my client is not ready to accept as the code was developed by one of their high efficient ex employee. They want me to show the dependent variable name from the glm outcome. Can you suggest me how should I get dependent variable name from glm outcome?

Answer 1

You should able to see which is the dependent variable from the formula object with just subsetting:

formula <- as.formula("y ~ x + b")
formula[[2]]
y
# or 
all.vars(formula)[1]
[1] "y"