Aggregation.First Method

Definition

Namespace: Numerics.NET.DataAnalysis
Assembly: Numerics.NET (in Numerics.NET.dll) Version: 10.8.0

First<C>(ColumnSelector)	Creates a descriptor that returns first values in selected columns.
First<C>(C)	Creates a descriptor that returns the first value in the specified column.

Creates a descriptor that returns first values in selected columns.

public static Aggregation<C, string> First<C>(
	ColumnSelector selector
)

Visual Basic

Public Shared Function First(Of C) ( 
	selector As ColumnSelector
) As Aggregation(Of C, String)

C++/CLI

public:
generic<typename C>
static Aggregation<C, String^>^ First(
	ColumnSelector^ selector
)

static member First : 
        selector : ColumnSelector -> Aggregation<'C, string>

Aggregation<C, String>
A first-value aggregation descriptor.

selector is null.

Creates a descriptor that returns the first value in the specified column.

public static Aggregation<C, string> First<C>(
	C key
)

Visual Basic

Public Shared Function First(Of C) ( 
	key As C
) As Aggregation(Of C, String)

C++/CLI

public:
generic<typename C>
static Aggregation<C, String^>^ First(
	C key
)

static member First : 
        key : 'C -> Aggregation<'C, string>

Aggregation<C, String>
A first-value aggregation descriptor.

key is null.