while using regr.ranger I'm getting an error message that says importance.mode must be one of "impurity" etc.
While using regr.rfsrc it says I should specify 'importance' to one of 'TRUE' etc.
I just want to understand at what stage should I assign the value to 'importance'.
I get an error if I do it while creating the learner.
> lrnr_ranger = mlr_learners$get(key = "regr.ranger",importance="impurity")
Error in initialize(...) : unused argument (importance = "impurity")
or
> lrnr_ranger = mlr_learners$get(key = "regr.ranger",importance.mode="impurity")
Error in initialize(...) : unused argument (importance.mode = "impurity")
or should I try to set it using the param_set:
> lrnr_ranger$param_set$add(p = list("importance.mode","impurity"))
Error in .__ParamSet__add(self = self, private = private, super = super, :
Assertion on 'p' failed: Must inherit from class 'Param'/'ParamSet', but has class 'list'.
Any clue would be super helpful.
I'm not really reporting a problem but asking how to do something. (Hence, I believe no need to create a reprex!)
I wish this was addressed in the mlr3 book or some documentation but it is not.