Creates a new column by applying a logical function to the elements of a column. Elements in the original column that return true are set to the given true value in the new column; elements that return false are not changed.

Namespace: CenterSpace.NMath.Core
Assembly: NMath (in NMath.dll) Version: 7.4

Syntax

C++

Copy

public static IDFColumn If(
	IDFColumn data,
	Func<double, bool> function,
	double ifTrue
)

Public Shared Function If ( 
	data As IDFColumn,
	function As Func(Of Double, Boolean),
	ifTrue As Double
) As IDFColumn

public:
static IDFColumn^ If(
	IDFColumn^ data, 
	Func<double, bool>^ function, 
	double ifTrue
)

static member If : 
        data : IDFColumn * 
        function : Func<float, bool> * 
        ifTrue : float -> IDFColumn

Parameters

data IDFColumn: A column.
function FuncDouble, Boolean: A function that takes a double and returns a boolean.
ifTrue Double: Value in case of true.

Return Value

IDFColumn
A new column.

Exceptions

Exception	Condition
InvalidArgumentException	Thrown if data is not numeric.

Reference

NMathFunctions Class

If Overload

CenterSpace.NMath.Core Namespace