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From Andrew Musselman <>
Subject Re: How to use the below dataset in Mahout (cf)
Date Sat, 13 Jul 2013 03:13:24 GMT
You'll have to do the same type of logic either way; it's straightforward to convert the format
you have into the market matrix type of input you are looking for.

Here is a decent starting point with some background on the rationale for the three-column

Hope this helps!


On Jul 12, 2013, at 8:55 PM, Naveen <> wrote:

> Hi All,
> I want to build a recommender engine using cf of Mahout with a dataset as below:
> <user,car1-rating,car2-rating, ............carn-rating> where user is string value
and ratings are numeric.
> Mahout seems to support <userid,itemid,rating> with numerical values directly,
but is there a way to support a dataset like above by building a custom FileDataModel? 
> Or do we need to convert the dataset to the Mahout supported dataset format?
> I am new to Mahout.
> Please provide me an example where possible.
> Thanks in advance,
> Naveen

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