Hi @nirgrahamuk . Valid point.
I know ranger does allow it. There is a published example where the authors have calculated the -loglik for their own model, alongside the ranger model.
However, it's not something you can do within the context of ranger itself. I think it has to be generated using another package. I just wondered if you knew of examples (ranger or otherwise), where customised loss functions can be imposed on a model?
Such as transforming the objective from minimising MSE, to minimising -loglik.