FrameViewGroupByT(String, FuncFrameView, T, String) Method

public FrameTable GroupBy<T>(
	string groupByColumnName,
	Func<FrameView, T> aggregator,
	string aggregateColumnName
)

Public Function GroupBy(Of T) ( 
	groupByColumnName As String,
	aggregator As Func(Of FrameView, T),
	aggregateColumnName As String
) As FrameTable

public:
generic<typename T>
FrameTable^ GroupBy(
	String^ groupByColumnName, 
	Func<FrameView^, T>^ aggregator, 
	String^ aggregateColumnName
)

member GroupBy : 
        groupByColumnName : string * 
        aggregator : Func<FrameView, 'T> * 
        aggregateColumnName : string -> FrameTable 

Parameters

groupByColumnName  String

The name of the column to group by.

aggregator  FuncFrameView, T

A function that computes the aggregate quantity.

aggregateColumnName  String

The name of the column for the aggregate output.

Type Parameters

T

The type of the aggregate output.

Return Value

The function that computes the aggregate receives a FrameView containing all the rows in the group. To produce an aggregate result, it can use values in any of the columns.

To produce more than one aggregate value, use GroupBy(String, FuncFrameView, IReadOnlyDictionaryString, Object).

Reference