Generates a data frame with a column for the group identifier and a column of values from the transform.
- Parameters:
- columnID: A column identifier.
- aggregatedColumnName: The name of the aggregation column the method adds to the data frame.
- transform: A closure that transforms each group's elements in the column.
Generates two row groupings by randomly splitting the original with a proportion.
- Parameters proportion: A proportion in the range `[0.0, 1.0]`.
- Returns: A tuple of two row groupings.
method · iOS 15.0+
sums
Swift declaration
func sums<N>(_ columnID: ColumnID<N>, order: Order? = nil) -> DataFrame where N : AdditiveArithmetic, N : Comparable
Generates a data frame that contains the sum of each group's rows along a column you select
by column identifier.
- Parameters:
- columnID: A column identifier.
- order: A sorting order the method uses to sort the data frame by its sum column.
method · iOS 15.0+
means
Swift declaration
func means<N>(_ columnID: ColumnID<N>, order: Order? = nil) -> DataFrame where N : FloatingPoint
Generates a data frame that contains the average mean of each group's rows along a column you select
by column identifier.
- Parameters:
- columnID: A column identifier.
- order: A sorting order the method uses to sort the data frame by its mean column.
method · iOS 15.0+
counts
Swift declaration
func counts() -> DataFrame
Generates a data frame with two columns, one that has a row for each group key and another for the number of
rows in the group.
The name of the data frame's column that stores the number of rows in each group is *count*.
method · iOS 15.0+
quantiles
Swift declaration
func quantiles<N>(_ columnID: ColumnID<N>, quantile: N, order: Order? = nil) -> DataFrame where N : BinaryFloatingPoint
Generates a data frame that contains the quantiles of each group's rows along a column you select
by column identifier.
- Parameters:
- columnID: A column identifier.
- quantile: A number between 0.0 and 1.0 that represents the percentage of the data that lies below
the resulting value.
- order: A sorting order the method uses to sort the data frame by its third quartile column.
- Precondition: Quantile must be between 0.0 and 1.0.
Skipped declarations
9 declarations were excluded from these bindings. Each reason comes from the generator or the iOS SDK compiler.
