Hi folks!
How do I extract lags from a formula? An example:
mod.eq<-formula(x~lag(x,-1)+lag(x,-2))
> mod.eq
x ~ lag(x, -1) + lag(x, -2)
> mod.eq[1]
"~"()
> mod.eq[2]
x()
> mod.eq[3]
lag(x, -1) + lag(x, -2)()
I'm trying to extract the lags into a vector that would be simply [1,2].
How do I do this? I'm using the dyn package to do dynamic regression.
John
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