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From Jason Thomas <katsoftware...@gmail.com>
Subject Re: genetic algorithms / watchmaker removal
Date Sun, 12 Aug 2012 23:14:19 GMT
Thanks for the help Ted, I will check it out.

On Sun, Aug 12, 2012 at 1:36 AM, Ted Dunning <ted.dunning@gmail.com> wrote:

> That sounds like a continuous optimization problem.
>
> Look at the org.apache.mahout.ep.EvolutionaryProcess
>
> It is an implementation of recorded step meta-mutation and does quite well
> on many problems.
>
> See http://arxiv.org/abs/0803.3838 for details on the algorithm.
>
> On Sat, Aug 11, 2012 at 8:24 PM, Jason Thomas <katsoftwarellc@gmail.com
> >wrote:
>
> > It's a search/optimization problem.  I have an existing complex model
> > (multiple neural nets) and I need to find the right combination of inputs
> > to achieve certain target outputs.  It seems like GA would be the easiest
> > approach for this.
> >
> > I'll take a look at the old Watchmaker code and maybe try to improve on
> it.
> >  Thanks for the help.
> >
> > -Jason
> >
> >
> > On Sat, Aug 11, 2012 at 6:20 PM, Ted Dunning <ted.dunning@gmail.com>
> > wrote:
> >
> > > The Watchmaker implementation was not very scalable and there was no
> > > perceptible user demand for it.  There was also nobody who was
> > maintaining
> > > it.
> > >
> > > So we nuked it.
> > >
> > > There is still a limited evolutionary algorithm that is part of the
> > > AdaptiveLogisticRegression.  It is likely to be pretty good on problems
> > > that involve the optimization of functions of continuous variables.
> > >
> > > What sort of GA do you need?
> > >
> > > On Sat, Aug 11, 2012 at 6:37 AM, Jason Thomas <
> katsoftwarellc@gmail.com
> > > >wrote:
> > >
> > > > I noticed Watchmaker support was removed.  Could someone tell me if
> > this
> > > > was because genetic algorithms in general aren't in line with Mahout
> > > goals
> > > > or was there a problem specifically with the Watchmaker
> > > > integration/implementation?  I need scalable GA and I'm trying to
> > figure
> > > > out how to proceed.
> > > >
> > > > Thanks,
> > > > Jason
> > > >
> > >
> >
>

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