Question

Using the package earth, I have a number of models and I would like to call a model up by its index number.

I have tried using a list but this does not work.

a <- list(a)
a[1] <- earth(Volume ~ ., data = trees1)
a[2] <- earth(Volume ~ ., data = trees2)
a[3] <- earth(Volume ~ ., data = trees3)

I would be grateful for your help.

Answer 1

Try this:

a <- list(a)
a[[1]] <- earth(Volume ~ ., data = trees1)
a[[2]] <- earth(Volume ~ ., data = trees2)
a[[3]] <- earth(Volume ~ ., data = trees3)

You will generally want to access the contents with “[[” as well.