Re: implicit ALS dataSet

2014-06-23 Thread redocpot
ver fitting, while big lambda like 300 removes over fitting but the nb of diff items on the top 1 and top 5 of the preference list is very small (not personalized). -- View this message in context: http://apache-spark-user-list.1001560.n3.nabble.com/implicit-ALS-dataSet-tp7067p8115.html Sent f

Re: implicit ALS dataSet

2014-06-19 Thread Sean Owen
On Thu, Jun 19, 2014 at 3:44 PM, redocpot wrote: > As the paper said, the low ratings will get a low confidence weight, so if I > understand correctly, these dominant one-timers will be more *unlikely* to > be recommended comparing to other items whose nbPurchase is bigger. Correct, yes. > In f

Re: implicit ALS dataSet

2014-06-19 Thread redocpot
-ALS-dataSet-tp7067p7916.html Sent from the Apache Spark User List mailing list archive at Nabble.com.

Re: implicit ALS dataSet

2014-06-19 Thread Sean Owen
On Thu, Jun 19, 2014 at 3:03 PM, redocpot wrote: > We did some sanity check. For example, each user has his own item list which > is sorted by preference, then we just pick the top 10 items for each user. > As a result, we found that there were only 169 different items among the > (1060080 x 10) i

Re: implicit ALS dataSet

2014-06-19 Thread redocpot
pache-spark-user-list.1001560.n3.nabble.com/implicit-ALS-dataSet-tp7067p7912.html Sent from the Apache Spark User List mailing list archive at Nabble.com.

Re: implicit ALS dataSet

2014-06-05 Thread Sean Owen
On Thu, Jun 5, 2014 at 10:38 PM, redocpot wrote: > can be simplified by taking advantage of its algebraic structure, so > negative observations are not needed. This is what I think at the first time > I read the paper. Correct, a big part of the reason that is efficient is because of sparsity of

Re: implicit ALS dataSet

2014-06-05 Thread redocpot
ad the ALS implementation for more details. Hao -- View this message in context: http://apache-spark-user-list.1001560.n3.nabble.com/implicit-ALS-dataSet-tp7067p7086.html Sent from the Apache Spark User List mailing list archive at Nabble.com.

Re: implicit ALS dataSet

2014-06-05 Thread Sean Owen
it > has already done that ? In that case, I could simply pass only the positive > observation as the explicit ALS does. > > Hao. > > > > > -- > View this message in context: > http://apache-spark-user-list.1001560.n3.nabble.com/implicit-ALS-dataSet-tp7067.html > Sent from the Apache Spark User List mailing list archive at Nabble.com.

implicit ALS dataSet

2014-06-05 Thread redocpot
plicit ALS does. Hao. -- View this message in context: http://apache-spark-user-list.1001560.n3.nabble.com/implicit-ALS-dataSet-tp7067.html Sent from the Apache Spark User List mailing list archive at Nabble.com.