NMathFunctionsSumIf(IDFColumn, FuncInt32, Boolean, IDFColumn) Method

Calculates the sum of elements in one column based on evaluating a logical function on corresponding elements in another data.

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

Syntax

public static double SumIf(
	IDFColumn data,
	Func<int, bool> function,
	IDFColumn sum
)

Public Shared Function SumIf ( 
	data As IDFColumn,
	function As Func(Of Integer, Boolean),
	sum As IDFColumn
) As Double

public:
static double SumIf(
	IDFColumn^ data, 
	Func<int, bool>^ function, 
	IDFColumn^ sum
)

static member SumIf : 
        data : IDFColumn * 
        function : Func<int, bool> * 
        sum : IDFColumn -> float

data IDFColumn: Evaluation data.
function FuncInt32, Boolean: A function that takes an integer and returns a boolean.
sum IDFColumn: Sum data.

Double
A sum.

Exceptions

Exception	Condition
InvalidArgumentException	Thrown if data is not numeric.
MismatchedSizeException	Thrown if data and sum do not have the same length;