[R] Linear regression on several groups

[JesperHybel]

Example is spot on - sr for not providing one myself.
The results you calculate are what I'm looking for.

Would like a function F where I could type:

F(weight ~ Time, data = ChickWeight, SOME ARGUMENT = Diet))

Resulting in

for (i in 1:4){
print(

lm(weight ~ Time, data = ChickWeight, subset = Diet==i)

)
}

I'm simply trying to minimize amount of looping and typing etc.

BR Jesper




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