train_pa1_regr(array features, float target [, constant string options]) – PA-1 regressor that returns a relation consists of `(int|bigint|string) feature, float weight`.
avg(weight) as weight
train_pa1_regr(features,label) as (feature,weight)
GROUP BY feature
Platforms: WhereOS, Spark, Hive
More functions can be added to WhereOS via Python or R bindings or as Java & Scala UDF (user-defined function), UDAF (user-defined aggregation function) and UDTF (user-defined table generating function) extensions. Custom libraries can be added on via Settings-page or installed from WhereOS Store.