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From Sean Owen <>
Subject Re: Question about evaluating a Recommender System
Date Wed, 08 May 2013 15:21:43 GMT
It may be selected as a test item. Other algorithms can predict the
'4'. The test process is random so as to not favor one algorithm.
I think you are just arguing that the algorithm you are using isn't
good for your data -- so just don't use it. Is that not the answer?
I don't know what you mean by the mapping algorithm.

On Wed, May 8, 2013 at 4:17 PM, Zhongduo Lin <> wrote:
> Thank you for your reply. So in the case that item 4 is in the test set,
> will Mahout just not take it into consideration or generate any preference
> instead? Any is it there any way to evaluate the mapping algorithm in
> Mahout?
> Best Regards,
> Jimmy

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