finding new users

[Matthias Böhmer <ma...@m-boehmer.de>]

Hello,

how can I find out, if a userID is already available inside a
DataModel? I am trying to find out if the rating data of a user is
already known within a data model, that is updated periodically. If
the user is not available inside the data model, I then want do treat
him as an anonymous user. And: how can I give recommendations to a
new, i.e. anonymous, user if I have no values for preferences. I think
the API requires me to set preferences.

Best regards,
Matthias

Re: finding new users

[Ted Dunning <te...@gmail.com>]

Sean,

Are you back yet?

I have a friend in London who is apparently in somewhat dire straits
(mugged, everything taken except passport).  I am looking for resources in
London to help him out.

On Tue, Jul 27, 2010 at 6:26 AM, Sean Owen <sr...@gmail.com> wrote:

> There's no direct way to do this, but it's pretty straightforward to
> loop through a DataModel and pick out the "most popular" items
> according to whatever definition you like (most ratings, highest
> average rating, recency, etc.) Of course you can cache that for a long
> time.
>
> 2010/7/26 Matthias Böhmer <ma...@m-boehmer.de>:
> > I have found ItemAverageRecommender, what sounds interesting. However,
> > it seems that I have to pass a userID which is used internally.
>

Re: finding new users

[Sean Owen <sr...@gmail.com>]

There's no direct way to do this, but it's pretty straightforward to
loop through a DataModel and pick out the "most popular" items
according to whatever definition you like (most ratings, highest
average rating, recency, etc.) Of course you can cache that for a long
time.

2010/7/26 Matthias Böhmer <ma...@m-boehmer.de>:
> I have found ItemAverageRecommender, what sounds interesting. However,
> it seems that I have to pass a userID which is used internally.

Re: finding new users

[Matthias Böhmer <ma...@m-boehmer.de>]

I have found ItemAverageRecommender, what sounds interesting. However,
it seems that I have to pass a userID which is used internally.

2010/7/26 Steven Bourke <st...@ucd.ie>:
> Hi Matt,
>
> You could create a custom IDRescorer to return the top results to a user. You'd have to specify under which circumstances to do so.
>
> Steve
> On 26 Jul 2010, at 17:07, Matthias Böhmer wrote:
>
>> Does Mahout provide some functionality to recommend the most propular items?
>>
>>
>> 2010/7/23 Sean Owen <sr...@gmail.com>:
>>> Try to recommend, and catch NoSuchUserException.
>>> If you have no data at all for a user, there's no way to make
>>> recommendations since you know nothing about the user at all. However
>>> in this case you typically "recommend" a selection of most popular
>>> items to start.
>>>
>>> 2010/7/23 Matthias Böhmer <ma...@m-boehmer.de>:
>>>> Hello,
>>>>
>>>> how can I find out, if a userID is already available inside a
>>>> DataModel? I am trying to find out if the rating data of a user is
>>>> already known within a data model, that is updated periodically. If
>>>> the user is not available inside the data model, I then want do treat
>>>> him as an anonymous user. And: how can I give recommendations to a
>>>> new, i.e. anonymous, user if I have no values for preferences. I think
>>>> the API requires me to set preferences.
>>>>
>>>> Best regards,
>>>> Matthias
>>>>
>>>
>>
>>
>>
>> --
>> --
>
> Steven Bourke
> Clarity Centre for Sensor Web Technologies,
> Science North,
> School of Computer Science & Informatics,
> University College Dublin.
>
>
>
>



-- 
--

Re: finding new users

[Steven Bourke <st...@ucd.ie>]

Hi Matt, 

You could create a custom IDRescorer to return the top results to a user. You'd have to specify under which circumstances to do so. 

Steve 
On 26 Jul 2010, at 17:07, Matthias Böhmer wrote:

> Does Mahout provide some functionality to recommend the most propular items?
> 
> 
> 2010/7/23 Sean Owen <sr...@gmail.com>:
>> Try to recommend, and catch NoSuchUserException.
>> If you have no data at all for a user, there's no way to make
>> recommendations since you know nothing about the user at all. However
>> in this case you typically "recommend" a selection of most popular
>> items to start.
>> 
>> 2010/7/23 Matthias Böhmer <ma...@m-boehmer.de>:
>>> Hello,
>>> 
>>> how can I find out, if a userID is already available inside a
>>> DataModel? I am trying to find out if the rating data of a user is
>>> already known within a data model, that is updated periodically. If
>>> the user is not available inside the data model, I then want do treat
>>> him as an anonymous user. And: how can I give recommendations to a
>>> new, i.e. anonymous, user if I have no values for preferences. I think
>>> the API requires me to set preferences.
>>> 
>>> Best regards,
>>> Matthias
>>> 
>> 
> 
> 
> 
> -- 
> --

Steven Bourke
Clarity Centre for Sensor Web Technologies,
Science North,
School of Computer Science & Informatics,
University College Dublin.

Re: finding new users

[Matthias Böhmer <ma...@m-boehmer.de>]

Does Mahout provide some functionality to recommend the most propular items?


2010/7/23 Sean Owen <sr...@gmail.com>:
> Try to recommend, and catch NoSuchUserException.
> If you have no data at all for a user, there's no way to make
> recommendations since you know nothing about the user at all. However
> in this case you typically "recommend" a selection of most popular
> items to start.
>
> 2010/7/23 Matthias Böhmer <ma...@m-boehmer.de>:
>> Hello,
>>
>> how can I find out, if a userID is already available inside a
>> DataModel? I am trying to find out if the rating data of a user is
>> already known within a data model, that is updated periodically. If
>> the user is not available inside the data model, I then want do treat
>> him as an anonymous user. And: how can I give recommendations to a
>> new, i.e. anonymous, user if I have no values for preferences. I think
>> the API requires me to set preferences.
>>
>> Best regards,
>> Matthias
>>
>



-- 
--

Re: finding new users

[Sean Owen <sr...@gmail.com>]

Try to recommend, and catch NoSuchUserException.
If you have no data at all for a user, there's no way to make
recommendations since you know nothing about the user at all. However
in this case you typically "recommend" a selection of most popular
items to start.

2010/7/23 Matthias Böhmer <ma...@m-boehmer.de>:
> Hello,
>
> how can I find out, if a userID is already available inside a
> DataModel? I am trying to find out if the rating data of a user is
> already known within a data model, that is updated periodically. If
> the user is not available inside the data model, I then want do treat
> him as an anonymous user. And: how can I give recommendations to a
> new, i.e. anonymous, user if I have no values for preferences. I think
> the API requires me to set preferences.
>
> Best regards,
> Matthias
>