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Posted to user@mahout.apache.org by Xiaobo Gu <gu...@gmail.com> on 2011/07/12 15:03:20 UTC
What's the accuracy of random forests in Mahout?
Hi,
When the training data set can be loaded into memory, or each split
can be, what's accuracy of the decision forest algorithm, compared
with LogisticRegression. Do you have production usages with random
forest?
Regards,
Xiaobo Gu
Re: What's the accuracy of random forests in Mahout?
Posted by deneche abdelhakim <ad...@gmail.com>.
the in-memory implementation has basically similar precision of the original
Random Forests described by Breiman. The following Jira post shows some
results obtained on the same datasets used in Breiman's paper:
https://issues.apache.org/jira/browse/MAHOUT-122?focusedCommentId=12718777&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-12718777
On Tue, Jul 12, 2011 at 4:13 PM, Ted Dunning <te...@gmail.com> wrote:
> I don't believe that Mahout's random forests have been used in production.
> I have heard that some people got pretty good results in testing.
>
> On Tue, Jul 12, 2011 at 6:03 AM, Xiaobo Gu <gu...@gmail.com> wrote:
>
> > Hi,
> >
> > When the training data set can be loaded into memory, or each split
> > can be, what's accuracy of the decision forest algorithm, compared
> > with LogisticRegression. Do you have production usages with random
> > forest?
> >
> > Regards,
> >
> > Xiaobo Gu
> >
>
Re: What's the accuracy of random forests in Mahout?
Posted by Ted Dunning <te...@gmail.com>.
I don't believe that Mahout's random forests have been used in production.
I have heard that some people got pretty good results in testing.
On Tue, Jul 12, 2011 at 6:03 AM, Xiaobo Gu <gu...@gmail.com> wrote:
> Hi,
>
> When the training data set can be loaded into memory, or each split
> can be, what's accuracy of the decision forest algorithm, compared
> with LogisticRegression. Do you have production usages with random
> forest?
>
> Regards,
>
> Xiaobo Gu
>
Re: What's the accuracy of random forests in Mahout?
Posted by Ted Dunning <te...@gmail.com>.
I don't believe that Mahout's random forests have been used in production.
I have heard that some people got pretty good results in testing.
On Tue, Jul 12, 2011 at 6:03 AM, Xiaobo Gu <gu...@gmail.com> wrote:
> Hi,
>
> When the training data set can be loaded into memory, or each split
> can be, what's accuracy of the decision forest algorithm, compared
> with LogisticRegression. Do you have production usages with random
> forest?
>
> Regards,
>
> Xiaobo Gu
>