NMathFunctionsCountIf(IDFColumn, FuncInt32, Boolean) Method

Calculates how many elements in a column return true when a logical function is applied.

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

Syntax

public static int CountIf(
	IDFColumn data,
	Func<int, bool> function
)

Public Shared Function CountIf ( 
	data As IDFColumn,
	function As Func(Of Integer, Boolean)
) As Integer

public:
static int CountIf(
	IDFColumn^ data, 
	Func<int, bool>^ function
)

static member CountIf : 
        data : IDFColumn * 
        function : Func<int, bool> -> int

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

Int32
A count.

Exceptions

Exception	Condition
InvalidArgumentException	Thrown if data is not a DFIntColumn or cannot be converted to integers.