Hello, So to what does the matrix T and vector h_t in this slide match to? : https://docs.google.com/presentation/d/1MzIGFsATNeAYnLfoR6797ofcLeFRKSX7KB8GAYNtNPY/edit#slide=id.gf4d43b9e8_1_24
2017-05-10 21:10 GMT+04:00 Pat Ferrel <[email protected]>: > Content based recommendations are based on, well, content. You can really > only make recs if you have an example item as with the recommendations you > see at the bottom of product page on Amazon. > > For this make sure t have lots of properties of items, even keywords from > descriptions will work, but also categories, tags, brands, price ranges. > etc. These all must be encoded as JSON arrays of strings so prices might be > one of [“$0-$1”, “$1-$5”, …] other things like descriptions categories or > tags can have several strings attached. > > Then issue an item-based query with itemBias set higher (>1) to make use > of usage information first before content since it performs better. Then > add query fields for the various properties but include the values of the > item referenced in the “item” field. > > You will get similar items based on usage data unless there is none then > content will take over to recommend things with similar content. Play with > the itemBias, try >1 by varying amounts since you want usage based > similarity over content most of the time you have usage based data in the > model. There is no hard rule for the bias. > > > On May 10, 2017, at 6:36 AM, Dennis Honders <[email protected]> > wrote: > > According to the docs, the UR is considered as hybrid collaborative > filtering / content-based filtering. > In my case I have a purchase history. Quite a lot of products are never > bought so traditional techniques won't be able to make recommendations. For > those products (never bought/sold), will recommendations be made with > content-based filtering techniques? > If so, what techniques are used in UR? > > 2017-05-08 19:02 GMT+02:00 Pat Ferrel <[email protected]>: > >> yes to all for UR v0.5.0 >> >> UR v0.6.0 is sitting in the `develop` branch waiting for one more minor >> fix to be released. It uses the latest release of Mahout 0.13.0 so no need >> to build it for the project. Several new features too. I expect it to be >> out this week. >> >> >> On May 8, 2017, at 3:07 AM, Dennis Honders <[email protected]> >> wrote: >> >> Hi, >> >> Are the following docs up-to-date? >> >> PredictionIO: http://actionml.com/docs/pio_quickstart. >> Is version 0.11.0 suitable for UR? >> >> The UR: http://actionml.com/docs/ur. >> Is 0.5.0 the latest version? >> Is Mahout still necessary? >> >> Thanks, >> >> Dennis >> >> > >
