I have a formula from which I want to deduce the name of the response
variable. One way of doing so is as follows:
> my.form <- as.formula("y ~ x + z")
> all.vars(my.form)[1]
[1] "y"
>
Is there a better way and/or preferrred method of determining "y" from
my.form than this one? In messing around with terms, I came up with:
> all.vars(terms(my.form))[attr(terms(my.form), "response")]
[1] "y"
>
But that seems too ugly to be best.
Thanks,
Dave Kane
> R.version
_
platform i686-pc-linux-gnu
arch i686
os linux-gnu
system i686, linux-gnu
status
major 2
minor 1.0
year 2005
month 04
day 18
language R
>
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