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From Manuel Blechschmidt <>
Subject Re: Collaborative Filtering without ratings
Date Tue, 21 Feb 2012 21:25:54 GMT
Hi Simon,
yes, this is possible. The following demo project is doing that:

If you replace the Demo file with your data file you are ready to go.
(Actually only the first to entries are needed)

Here is a well documented EJB which is doing the complete recommender part:

Hope that helps

On 21.02.2012, at 19:47, Simon Franz wrote:

> Hi there,
> I'm very new to Mahout and recommender systems. I have made my first
> steps with mahout in java and mahout is really nice and quite "simple"
> to use.
> In my scenario I want to use Mahout as recommender for music. I have
> many tracks and users and a set of what each user has listen at a
> particular timestamp. Does Mahout support a recommender who can
> recommender for a datafile without ratings? Something like
> <userid>,<trackid> ?
> Thanks in advance.
> Best Regards
> Simon

Manuel Blechschmidt
Dortustr. 57
14467 Potsdam
Mobil: 0173/6322621

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