Thanks to both of you!
Manuel. It seems that your code directly use GenericDataModel without including extra fields such as category and time. So I still need to extend the GenericDataModel if I want to include tags, right? Thanks again, Jia On Thu, May 16, 2013 at 12:56 AM, Manuel Blechschmidt < [email protected]> wrote: > Hi Jia, > checkout the following example which is used to build a data model from a > similar dataset like yours: > > > https://github.com/ManuelB/facebook-recommender-demo/blob/master/src/main/java/de/apaxo/bedcon/FacebookRecommender.java#L139 > > Dataset: > > > https://github.com/ManuelB/facebook-recommender-demo/blob/master/src/main/resources/DemoFriendsLikes.csv > > Hope that helps > Manuel > > Am 16.05.2013 um 03:19 schrieb huangjia: > > > Hi, > > > > I want to build a recommendation model based on Mahout. My dataset format > > is in the format of > > > > userID, itemID, rating timestamp tag1 tag2 tag3. Thus, I think I need to > > extend the FileDataModel. > > > > I looked into *JesterDataModel* as an example. However, I have a problem > > with the logic flow. In its *buildModel()* method, an empty map "data" is > > first constructed. It is then thrown into processFile. I assume that > "data" > > is modified in this method, since later it is used to construct the > > GenericDataModel. However, "data" is a local variable instead of a class > > variable, so how is it modified? > > > > processFile(iterator, data, timestamps, false); > > return new GenericDataModel(GenericDataModel.toDataMap(data, true)); > > > > > > -- > > Jia > > -- > Manuel Blechschmidt > M.Sc. IT Systems Engineering > Dortustr. 57 > 14467 Potsdam > Mobil: 0173/6322621 > Twitter: http://twitter.com/Manuel_B > > -- Jia Huang PhD student College of Information Science & Technology Drexel University
