estimated_reach(x) – Estimate reach from a sketch set of Strings. Platforms: WhereOS, Spark, Hive Class:

double(expr) – Casts the value `expr` to the target data type `double`. Platforms: WhereOS, Spark,

each_top_k(int K, Object group, double cmpKey, *) – Returns top-K values (or tail-K values when

element_at(array, index) – Returns element of array at given (1-based) index. If index < 0,

distance2similarity(float d) – Returns 1.0 / (1.0 + d) Platforms: WhereOS, Spark, Hive Class: hivemall.knn.similarity.Distance2SimilarityUDF

distcache_gets(filepath, key, default_value [, parseKey]) – Returns map|value_type Platforms: WhereOS, Spark, Hive Class: hivemall.tools.mapred.DistributedCacheLookupUDF More