Jiong Zhang, PhD wrote:
> Hi All,
>
> I want to run regression (lm) on my dependant variable by gender and race.
> How do I integrate the "by" function in lm?
>
> thanks.
Here is an example using the iris data:
by(iris, iris$Species, function(x){
summary(lm(Sepal.Length ~ Sepal.Width +
Petal.Length +
Petal.Width, data=x))})
> jiong
> The email message (and any attachments) is for the sole...{{dropped:11}}
>
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