dataframe-0.4.0.5: A fast, safe, and intuitive DataFrame library.

Safe Haskell	None
Language	Haskell2010

DataFrame.Operations.Aggregation

Synopsis

groupBy :: [Text] -> DataFrame -> GroupedDataFrame
changingPoints :: Vector (Int, Int) -> Vector Int
computeRowHashes :: [Int] -> DataFrame -> Vector Int
aggregate :: [NamedExpr] -> GroupedDataFrame -> DataFrame
selectIndices :: Vector Int -> DataFrame -> DataFrame
distinct :: DataFrame -> DataFrame

Documentation

groupBy :: [Text] -> DataFrame -> GroupedDataFrame Source #

O(k * n) groups the dataframe by the given rows aggregating the remaining rows into vector that should be reduced later.

changingPoints :: Vector (Int, Int) -> Vector Int Source #

computeRowHashes :: [Int] -> DataFrame -> Vector Int Source #

aggregate :: [NamedExpr] -> GroupedDataFrame -> DataFrame Source #

Aggregate a grouped dataframe using the expressions given. All ungrouped columns will be dropped.

selectIndices :: Vector Int -> DataFrame -> DataFrame Source #

distinct :: DataFrame -> DataFrame Source #

Filter out all non-unique values in a dataframe.