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From Stefano Bellasio <>
Subject Re: Grouplens dataset Recommenderjob with Hadoop
Date Sat, 20 Nov 2010 10:14:25 GMT
Thanks for the answer :) Well right now i have a ratings.dat file, what i have to do? convert
it as you said in CSV with :: instead of , ? Thanks
Il giorno 20/nov/2010, alle ore 11.12, Sean Owen ha scritto:

> It's the exact same process -- what does "doesn't work" mean? what error?
> The process of converting the data to CSV is of course entirely different.
> You would not apply that part to such a different input. Just use a text
> processing tool to convert GroupLens's file to replace "::" with "," and
> remove the last column.
> On Sat, Nov 20, 2010 at 10:06 AM, Stefano Bellasio <
>> wrote:
>> Hi, i want to know which are the correct steps in order to use my grouplens
>> data set (10M ratings) with Hadoop and RecommenderJob, with pseudo or not
>> pseudo item based recommender. Right now i tried to follow the example of
>> Wikipedia data set saw in Mahout in Action, but doesn't works or i don't
>> understood how i can use RecommenderJob with the data set. Someone can
>> explan something about this? Thanks :) Stefano

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