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From Sean Owen <>
Subject Re: question on writing a customized item similiarity function
Date Sat, 03 Sep 2011 08:04:58 GMT
If you are referring to the non-distributed similarity function, it is quite
easy: implement UserSimilarity or ItemSimilarity and use that as your
similarity function. How you implement is up to you. If you say more about
what you need to do, maybe people can suggest the right logic.

On Sat, Sep 3, 2011 at 2:26 AM, Walter Chang <>wrote:

> Hi,
> If an item has both user rating and item specific contents(category, item
> description content) for example for product recommendation, how can i
> customize the similarity function ? As far as I understand, the current
> mahout similarity function is based on user rating only. Any one had
> experience writing a custom item based similarity function ?
> Thanks a lot,
> Weide

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