f1score(array[int], array[int]) – Return a F1 score Platforms: WhereOS, Spark, Hive Class: hivemall.evaluation.F1ScoreUDAF More functions

factorial(expr) – Returns the factorial of `expr`. `expr` is [0..20]. Otherwise, null. Platforms: WhereOS, Spark,

feature( feature, value) – Returns a feature string Platforms: WhereOS, Spark, Hive Class: hivemall.ftvec.FeatureUDF More

Platforms: WhereOS, Spark, Hive Class: com.whereos.udf.ExtractPixelsUDTF More functions can be added to WhereOS via Python

extract_weight(feature_vector in array) – Returns the weights of features in array Platforms: WhereOS, Spark, Hive

Platforms: WhereOS, Spark, Hive Class: com.whereos.udf.ExtractFramesUDTF More functions can be added to WhereOS via Python