Re: Random Forest model (number of trees)

If we use the default, then how many variables for each node? The default
is zero, and I read somewhere that zero means unlimited variables?

Regards

On Tue, Apr 27, 2021 at 7:37 PM Neha gupta <[email protected]> wrote:

> Hi Peter
>
> I am sorry but I did not understand your point. In the more option, I can
> see
>
> numFeatures -- Sets the number of randomly chosen attributes. If 0,
> int(log_2(#predictors) + 1)
>
> but how can I get the number of variables for each node? I have 20
> features in my dataset.
>
> Thank you
>
> On Tue, Apr 27, 2021 at 12:44 AM Peter Reutemann <[email protected]>
> wrote:
>
>> > If I am using the Random Forest model, how many trees will it have and
>> how many variables would be available for each tree node? I think the
>> default number of trees in Weka is 100 but in that case, how many variables
>> for each tree node?
>>
>> Copy/paste from the "More" dialog:
>>
>> numFeatures -- Sets the number of randomly chosen attributes. If 0,
>> int(log_2(#predictors) + 1) is used.
>>
>> Cheers, Peter
>> --
>> Peter Reutemann
>> Dept. of Computer Science
>> University of Waikato, NZ
>> +64 (7) 577-5304
>> http://www.cms.waikato.ac.nz/~fracpete/
>> http://www.data-mining.co.nz/
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>

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