mahout-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Tevfik Aytekin <tevfik.ayte...@gmail.com>
Subject Re: Problems with Mahout's RecommenderIRStatsEvaluator
Date Sat, 16 Feb 2013 20:28:07 GMT
No, rating prediction is clearly a supervised ML problem

On Sat, Feb 16, 2013 at 10:15 PM, Sean Owen <srowen@gmail.com> wrote:
> This is a good answer for evaluation of supervised ML, but, this is
> unsupervised. Choosing randomly is choosing the 'right answers' randomly,
> and that's plainly problematic.
>
>
> On Sat, Feb 16, 2013 at 8:53 PM, Tevfik Aytekin <tevfik.aytekin@gmail.com>wrote:
>
>> I think, it is better to choose ratings of the test user in a random
>> fashion.
>>
>> On Sat, Feb 16, 2013 at 9:37 PM, Sean Owen <srowen@gmail.com> wrote:
>> > Yes. But: the test sample is small. Using 40% of your data to test is
>> > probably quite too much.
>> >
>> > My point is that it may be the least-bad thing to do. What test are you
>> > proposing instead, and why is it coherent with what you're testing?
>> >
>>

Mime
View raw message