A follow-up question. I worked around for quite a while and got stuck. It is difficult for me to figure out which are the classes I need to extend. I suppose they are : FileDataModel, Preference, PreferenceArray, am I correct?
Thanks! Jia On Fri, May 17, 2013 at 1:20 AM, Manuel Blechschmidt < manuel.blechschm...@gmx.de> wrote: > Yes Jia, that is correct. > > If you want to save additional data (context) then you have to extend the > current data models. The current algorithms won't use the additional data. > If you want to be able to integrate I would recommend that you search for > "contextaware recommender" e.g. > http://recsyswiki.com/wiki/Context-aware_recommendation > > /Manuel > > Am 16.05.2013 um 20:42 schrieb huangjia: > > > 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 < > > manuel.blechschm...@gmx.de> 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 > > -- > 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
