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 <dennishond...@gmail.com> 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 <p...@occamsmachete.com <mailto:p...@occamsmachete.com>>: 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 <dennishond...@gmail.com <mailto:dennishond...@gmail.com>> wrote: Hi, Are the following docs up-to-date? PredictionIO: http://actionml.com/docs/pio_quickstart <http://actionml.com/docs/pio_quickstart>. Is version 0.11.0 suitable for UR? The UR: http://actionml.com/docs/ur <http://actionml.com/docs/ur>. Is 0.5.0 the latest version? Is Mahout still necessary? Thanks, Dennis
