What's the parameter “number of prepruning alternatives”of Random Tree for?

lg21c

What's the parameter “number of prepruning alternatives”of Random Tree for?  the help explained as “ As prepruning runs parallel to the tree generation process, it may prevent splitting at certain nodes when splitting at that node does not add to the discriminative power of the entire tree. In such a case alternative nodes are tried for splitting. This parameter adjusts the number of alternative nodes tried for splitting when split is prevented by prepruning at a certain node. ”，I don't get it，please explain further or give me a example

jwpfau

Hi,

it not just using the split with the best benefit, but also checks the next n best split options.

The relevant code can also be found on github if this helps.

Greetings,
Jonas