SumIf(Vector,BooleanVector) Method

Returns the sum of the elements of the Vectorx where the corresponding BooleanVector is True.

Syntax

Visual Basic

'Declaration
 
Public Overloads Shared Function SumIf( _
   ByVal x As Vector, _
   ByVal comparison As BooleanVector _
) As Double

C#

public static double SumIf( 
   Vector x,
   BooleanVector comparison
)

Parameters

x

A Vector.

comparison

A BooleanVector with the same length and orientation as x.

Return Value

The sum of the elements of x where comparison is true.

Exceptions

Exception	Description
System.ArithmeticException	Occurs if the comparison has a different length than x.
System.ArithmeticException	Occurs if the comparison has a different orientation than x.

Remarks

The BooleanVector comparison can be easily constructed using the compare operators on Vector. The following notation is convenient: Vector x1 = Compute.Line(-1, 1, 1000); double sumif = Compute.SumIf(x, x > 0);

Requirements

Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2