[R] a very easy question, how to extract the name of the response variable

[Eric R.]

This may not be the smoothest way to produce the result, but here is a
two-step solution:

first find the formula within the object created by the call to glm():

form <- qq["formula"] or equivalently form <- qq$formula

then apply the function all.vars() to the result, and return the first
element 

variables.in.formula <- all.vars(form)

variables.in.formula[1]  #  will be the response variable


leffgh wrote:
> 
> for example
> glm(a~b+c+d,data=eee)->qq
> 
> Is there a function able to return the name of the response variable?
> suppose "ff" is the function satisfying this need,
> ff(qq) then "a" (Not the value of a) will be returned.
> could you tell me which is the "ff" I am looking for ?
> 
> Thank you very much 
> 
> 

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