Is there an example of how to use RankingMetrics ?
Let's take the user, document example...we get user x topic and document x
topic matrices as the model...
Now for each user, we can generate topK document by doing a sort on (1 x
topic)dot(topic x document) and picking topK...
Is it possible to
On Wed, Oct 29, 2014 at 6:02 PM, Niklas Wilcke
<1wil...@informatik.uni-hamburg.de> wrote:
> The core tests seems to fail because of my german locale. Some tests are
> locale dependend like the
> UtilsSuite.scala
> - "string formatting of time durations" - checks for locale dependend
> seperators l
Makes sense for the binary and ranking problem but for example linear
regression for multi-class also optimizes on RMSE but we still measure the
prediction efficiency using some measure on confusion matrix...Is not the
same idea should hold for ALS as well ?
On Wed, Oct 29, 2014 at 12:14 PM, Xian
Let's narrow the context from matrix factorization to recommendation
via ALS. It adds extra complexity if we treat it as a multi-class
classification problem. ALS only outputs a single value for each
prediction, which is hard to convert to probability distribution over
the 5 rating levels. Treating
Hi,
In the current factorization flow, we cross validate on the test dataset
using the RMSE number but there are some other measures which are worth
looking into.
If we consider the problem as a regression problem and the ratings 1-5 are
considered as 5 classes, it is possible to generate a confu
One thing is you need to do a "maven package" before you run tests.
The "local-cluster" tests depend on Spark already being packaged.
- Patrick
On Wed, Oct 29, 2014 at 10:02 AM, Niklas Wilcke
<1wil...@informatik.uni-hamburg.de> wrote:
> Hi Sean,
>
> thanks for your reply. The tests still don't wo
Hi Sean,
thanks for your reply. The tests still don't work. I focused on the
mllib and core tests and made some observations.
The core tests seems to fail because of my german locale. Some tests are
locale dependend like the
UtilsSuite.scala
- "string formatting of time durations" - checks for l
