DataFrame.JoinOnNearest<R, C> Method

Returns a new data frame by joining a data frames on the nearest keys in their row indexes.

Definition

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

public static DataFrame<R, C> JoinOnNearest<R, C>(
	this DataFrame<R, C> left,
	DataFrame<R, C> right,
	Direction direction,
	Func<C, C> thisKeyModifier = null,
	Func<C, C> rightKeyModifier = null
)

Visual Basic

<ExtensionAttribute>
Public Shared Function JoinOnNearest(Of R, C) ( 
	left As DataFrame(Of R, C),
	right As DataFrame(Of R, C),
	direction As Direction,
	Optional thisKeyModifier As Func(Of C, C) = Nothing,
	Optional rightKeyModifier As Func(Of C, C) = Nothing
) As DataFrame(Of R, C)

C++/CLI

public:
[ExtensionAttribute]
generic<typename R, typename C>
static DataFrame<R, C>^ JoinOnNearest(
	DataFrame<R, C>^ left, 
	DataFrame<R, C>^ right, 
	Direction direction, 
	Func<C, C>^ thisKeyModifier = nullptr, 
	Func<C, C>^ rightKeyModifier = nullptr
)

[<ExtensionAttribute>]
static member JoinOnNearest : 
        left : DataFrame<'R, 'C> * 
        right : DataFrame<'R, 'C> * 
        direction : Direction * 
        ?thisKeyModifier : Func<'C, 'C> * 
        ?rightKeyModifier : Func<'C, 'C> 
(* Defaults:
        let _thisKeyModifier = defaultArg thisKeyModifier null
        let _rightKeyModifier = defaultArg rightKeyModifier null
*)
-> DataFrame<'R, 'C>

Parameters

left DataFrame<R, C>: The data frame that serves as the left operand of the join operation.
right DataFrame<R, C>: The data frame that serves as the right operand of the join operation.
direction Direction: The direction to look for the key if an exact match is not found.
thisKeyModifier Func<C, C> (Optional): A function that modifies a column key of this data frame to make it unique.
rightKeyModifier Func<C, C> (Optional): A function that modifies a column key of the right data frame to make it unique.

Type Parameters

R: The element type of the row index of the data frames.
C: The element type of the column index of the data frames.

Return Value

DataFrame<R, C>
The joined data frame.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type DataFrame<R, C>. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).

Exceptions

ArgumentNullException

right is null.