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 version: http://math.nist.gov/MatrixMarket/formats.html Hope this helps! Best Andrew On Jul 12, 2013, at 8:55 PM, Naveen <[email protected]> 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
