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Posted to user@mahout.apache.org by Charly Lizarralde <ch...@gmail.com> on 2012/10/03 15:53:24 UTC
Estimating preferences with Distributed Item Based Recommender
Is it possible to use RecommenderJob (Map Reduce/Item Based ) to estimate
preferences por specific <user,item> dataset ?
Thanks!
Charly
Re: Estimating preferences with Distributed Item Based Recommender
Posted by Matt Mitchell <go...@gmail.com>.
Thanks for this Charly. Code would be great if you don't mind. Much appreciated!
- Matt
On Fri, Oct 5, 2012 at 10:05 AM, Charly Lizarralde
<ch...@gmail.com> wrote:
> Of course.
>
> I used the DataSetSplitter for spliting the datasets into training & probe.
>
> I created a job very similar to the aggregateAndRecommender step of the
> RecommenderJob. I copied and modified the
> AggregateAndRecommendReducer.class to be EstimatePreferenceReducer.class
> that loads in the setup the probe dataset.
>
> If you want I can send you the code...but it's not very clean.
>
> On Fri, Oct 5, 2012 at 10:42 AM, Matt Mitchell <go...@gmail.com> wrote:
>
>> Hi Charly. Would you mind showing, or at least describing how you did this?
>>
>> Thanks,
>> Matt
>>
>> On Fri, Oct 5, 2012 at 9:21 AM, Charly Lizarralde
>> <ch...@gmail.com> wrote:
>> > Finally I could manage to do that. It was not so difficult after all. I
>> > used that for calculating RMSE.
>> >
>> > Thanks!
>> > Charly
>> >
>> > On Wed, Oct 3, 2012 at 1:54 PM, Charly Lizarralde <
>> > charly.lizarralde@gmail.com> wrote:
>> >
>> >> Thanks! I think I'll manage.
>> >>
>> >> On Wed, Oct 3, 2012 at 11:47 AM, Sean Owen <sr...@gmail.com> wrote:
>> >>
>> >>> Yes... you'd have to modify it a little though. The stage right before
>> >>> recommendation in the pipeline computes all the estimates, on which
>> >>> the results are ranked. You would just change this to output these
>> >>> all, or, just the ones you want. There's nothing out of the box that
>> >>> does this.
>> >>>
>> >>> On Wed, Oct 3, 2012 at 2:53 PM, Charly Lizarralde
>> >>> <ch...@gmail.com> wrote:
>> >>> > Is it possible to use RecommenderJob (Map Reduce/Item Based ) to
>> >>> estimate
>> >>> > preferences por specific <user,item> dataset ?
>> >>> >
>> >>> > Thanks!
>> >>> > Charly
>> >>>
>> >>
>> >>
>>
Re: Estimating preferences with Distributed Item Based Recommender
Posted by Charly Lizarralde <ch...@gmail.com>.
Of course.
I used the DataSetSplitter for spliting the datasets into training & probe.
I created a job very similar to the aggregateAndRecommender step of the
RecommenderJob. I copied and modified the
AggregateAndRecommendReducer.class to be EstimatePreferenceReducer.class
that loads in the setup the probe dataset.
If you want I can send you the code...but it's not very clean.
On Fri, Oct 5, 2012 at 10:42 AM, Matt Mitchell <go...@gmail.com> wrote:
> Hi Charly. Would you mind showing, or at least describing how you did this?
>
> Thanks,
> Matt
>
> On Fri, Oct 5, 2012 at 9:21 AM, Charly Lizarralde
> <ch...@gmail.com> wrote:
> > Finally I could manage to do that. It was not so difficult after all. I
> > used that for calculating RMSE.
> >
> > Thanks!
> > Charly
> >
> > On Wed, Oct 3, 2012 at 1:54 PM, Charly Lizarralde <
> > charly.lizarralde@gmail.com> wrote:
> >
> >> Thanks! I think I'll manage.
> >>
> >> On Wed, Oct 3, 2012 at 11:47 AM, Sean Owen <sr...@gmail.com> wrote:
> >>
> >>> Yes... you'd have to modify it a little though. The stage right before
> >>> recommendation in the pipeline computes all the estimates, on which
> >>> the results are ranked. You would just change this to output these
> >>> all, or, just the ones you want. There's nothing out of the box that
> >>> does this.
> >>>
> >>> On Wed, Oct 3, 2012 at 2:53 PM, Charly Lizarralde
> >>> <ch...@gmail.com> wrote:
> >>> > Is it possible to use RecommenderJob (Map Reduce/Item Based ) to
> >>> estimate
> >>> > preferences por specific <user,item> dataset ?
> >>> >
> >>> > Thanks!
> >>> > Charly
> >>>
> >>
> >>
>
Re: Estimating preferences with Distributed Item Based Recommender
Posted by Matt Mitchell <go...@gmail.com>.
Hi Charly. Would you mind showing, or at least describing how you did this?
Thanks,
Matt
On Fri, Oct 5, 2012 at 9:21 AM, Charly Lizarralde
<ch...@gmail.com> wrote:
> Finally I could manage to do that. It was not so difficult after all. I
> used that for calculating RMSE.
>
> Thanks!
> Charly
>
> On Wed, Oct 3, 2012 at 1:54 PM, Charly Lizarralde <
> charly.lizarralde@gmail.com> wrote:
>
>> Thanks! I think I'll manage.
>>
>> On Wed, Oct 3, 2012 at 11:47 AM, Sean Owen <sr...@gmail.com> wrote:
>>
>>> Yes... you'd have to modify it a little though. The stage right before
>>> recommendation in the pipeline computes all the estimates, on which
>>> the results are ranked. You would just change this to output these
>>> all, or, just the ones you want. There's nothing out of the box that
>>> does this.
>>>
>>> On Wed, Oct 3, 2012 at 2:53 PM, Charly Lizarralde
>>> <ch...@gmail.com> wrote:
>>> > Is it possible to use RecommenderJob (Map Reduce/Item Based ) to
>>> estimate
>>> > preferences por specific <user,item> dataset ?
>>> >
>>> > Thanks!
>>> > Charly
>>>
>>
>>
Re: Estimating preferences with Distributed Item Based Recommender
Posted by Charly Lizarralde <ch...@gmail.com>.
Finally I could manage to do that. It was not so difficult after all. I
used that for calculating RMSE.
Thanks!
Charly
On Wed, Oct 3, 2012 at 1:54 PM, Charly Lizarralde <
charly.lizarralde@gmail.com> wrote:
> Thanks! I think I'll manage.
>
> On Wed, Oct 3, 2012 at 11:47 AM, Sean Owen <sr...@gmail.com> wrote:
>
>> Yes... you'd have to modify it a little though. The stage right before
>> recommendation in the pipeline computes all the estimates, on which
>> the results are ranked. You would just change this to output these
>> all, or, just the ones you want. There's nothing out of the box that
>> does this.
>>
>> On Wed, Oct 3, 2012 at 2:53 PM, Charly Lizarralde
>> <ch...@gmail.com> wrote:
>> > Is it possible to use RecommenderJob (Map Reduce/Item Based ) to
>> estimate
>> > preferences por specific <user,item> dataset ?
>> >
>> > Thanks!
>> > Charly
>>
>
>
Re: Estimating preferences with Distributed Item Based Recommender
Posted by Charly Lizarralde <ch...@gmail.com>.
Thanks! I think I'll manage.
On Wed, Oct 3, 2012 at 11:47 AM, Sean Owen <sr...@gmail.com> wrote:
> Yes... you'd have to modify it a little though. The stage right before
> recommendation in the pipeline computes all the estimates, on which
> the results are ranked. You would just change this to output these
> all, or, just the ones you want. There's nothing out of the box that
> does this.
>
> On Wed, Oct 3, 2012 at 2:53 PM, Charly Lizarralde
> <ch...@gmail.com> wrote:
> > Is it possible to use RecommenderJob (Map Reduce/Item Based ) to estimate
> > preferences por specific <user,item> dataset ?
> >
> > Thanks!
> > Charly
>
Re: Estimating preferences with Distributed Item Based Recommender
Posted by Sean Owen <sr...@gmail.com>.
Yes... you'd have to modify it a little though. The stage right before
recommendation in the pipeline computes all the estimates, on which
the results are ranked. You would just change this to output these
all, or, just the ones you want. There's nothing out of the box that
does this.
On Wed, Oct 3, 2012 at 2:53 PM, Charly Lizarralde
<ch...@gmail.com> wrote:
> Is it possible to use RecommenderJob (Map Reduce/Item Based ) to estimate
> preferences por specific <user,item> dataset ?
>
> Thanks!
> Charly