Thank you Peter and Andreas. That makes sense. Thanks for responding so
quickly.
Lukas
On Mon, Feb 4, 2013 at 10:40 AM, Ribonucleico <[email protected]>wrote:
>
>
> ---------- Forwarded message ----------
> From: Peter Prettenhofer <[email protected]>
> Date: Mon, Feb 4, 2013 at 10:08 AM
> Subject: Re: [Scikit-learn-general] Random forests: Measuring information
> gain in multi-output
> To: [email protected]
>
>
> Hi Lukas,
>
> the impurity (in your case entropy) is simply averaged over all
> outputs - see [1] - the code is written in cython (a python dialect
> that translates to C).
>
> best,
> Peter
>
> [1]
> https://github.com/scikit-learn/scikit-learn/blob/master/sklearn/tree/_tree.pyx#L1482
>
> 2013/2/4 Ribonous <[email protected]>:
> > I think I understand how a random forest classifier works in the
> univariate
> > case. Unfortunately I haven't found much information about how to
> implement
> > random forest classifier in the multi-output case.
> >
> > How does the random forest classifier in sklearn measure the information
> > gain for a given split in the multi-output case ? Can anyone point me to
> > references on this?
> >
> > Also, is the random forest implementation written in Python or another
> > language?
> >
> > Thanks,
> >
> > Lukas
> >
> >
> >
> >
> ------------------------------------------------------------------------------
> > Everyone hates slow websites. So do we.
> > Make your web apps faster with AppDynamics
> > Download AppDynamics Lite for free today:
> > http://p.sf.net/sfu/appdyn_d2d_jan
> > _______________________________________________
> > Scikit-learn-general mailing list
> > [email protected]
> > https://lists.sourceforge.net/lists/listinfo/scikit-learn-general
> >
>
>
>
> --
> Peter Prettenhofer
>
>
> ------------------------------------------------------------------------------
> Everyone hates slow websites. So do we.
> Make your web apps faster with AppDynamics
> Download AppDynamics Lite for free today:
> http://p.sf.net/sfu/appdyn_d2d_jan
> _______________________________________________
> Scikit-learn-general mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/scikit-learn-general
>
>
------------------------------------------------------------------------------
Everyone hates slow websites. So do we.
Make your web apps faster with AppDynamics
Download AppDynamics Lite for free today:
http://p.sf.net/sfu/appdyn_d2d_jan
_______________________________________________
Scikit-learn-general mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/scikit-learn-general
