DataFrame<R, C>.GroupedBy<R1> Method

Returns a new data frame by grouping the index by the specified column.

Definition

Namespace: Extreme.DataAnalysis
Assembly: Extreme.Numerics (in Extreme.Numerics.dll) Version: 8.1.23

public DataFrame<(R1 , R ), C> GroupedBy<R1>(
	C columnKey
)

Visual Basic

Public Function GroupedBy(Of R1) ( 
	columnKey As C
) As DataFrame(Of ( As R1,  As R), C)

C++/CLI

public:
generic<typename R1>
DataFrame<ValueTuple<R1, R>, C>^ GroupedBy(
	C columnKey
)

member GroupedBy : 
        columnKey : 'C -> DataFrame<ValueTuple<'R1, 'R>, 'C>

DataFrame<ValueTuple<R1, R>, C>
A new data frame indexed by combining the specified column with the existing index.

KeyNotFoundException	A column with key columnKey could not be found.
InvalidCastException	The column with key columnKey could not be cast to a vector with element type R1