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Re:MLDB – Machine Learning Database by nicolaskruchten on Sunday September 20, 2015 @12:34PM (#10248095)
(MLDB product lead here)

I hadn't seen RecDB, thanks for the link! At a glance, other than the licensing, the main point of comparison is that MLDB is more powerful/general-purpose than RecDB, as it provides primitives for not only for creating recommenders but to do other machine-learning tasks like classification, clustering, dimensionality reduction, visualization etc. MLDB also seems to have a bit more documentation :)

Re:MLDB – Machine Learning Database by boomzilla on Sunday September 20, 2015 @01:13PM (#10248229)
I've used madlib[1] before and was quite happy with that. Maybe you can do a feature comparison with similar existing solutions as many people don't have the bandwidth to go through your documentations.

[1] http://madlib.net/

Re:MLDB – Machine Learning Database by nicolaskruchten on Sunday September 20, 2015 @01:15PM (#10248234)
That's a good idea, thanks! What kinds of problems were you solving with madlib?
Re:MLDB – Machine Learning Database by boomzilla on Sunday September 20, 2015 @01:39PM (#10248312)
Classification problems in a medical domain. It literally took me 30 minutes to install madlib and run logistic regression on a table. It then probably took me a few more days to do some analysis, try out various algorithms and productionize the predictor.
Re:MLDB – Machine Learning Database by philgo20 on Sunday September 20, 2015 @04:57PM (#10249088)
A feature comparison with other solutions is a great idea. We'll work on that and share here.