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feature_binning(array features, map quantiles_map) – returns a binned feature vector as an array feature_binning(number weight,

feature_hashing(array features [, const string options]) – returns a hashed feature vector in array select

feature_index(feature_vector in array) – Returns feature indices in array Platforms: WhereOS, Spark, Hive Class: hivemall.ftvec.FeatureIndexUDF

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