FunctionMath.Sum Method

Definition

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

Overload List

Sum(Func<Int32, Double>, Int32, Int32) Computes the sum of an expression evaluated over the specified range.
Sum<T>(IEnumerable<T>, Func<T, Double>) Computes the sum of an expression evaluated for each member of a collection.

Sum<T>(IEnumerable<T>, Func<T, Double>)

Computes the sum of an expression evaluated for each member of a collection.
C#
public static double Sum<T>(
	IEnumerable<T> collection,
	Func<T, double> terms
)

Parameters

collection  IEnumerable<T>
An enumerable collection of elements of type T.
terms  Func<T, Double>
A delegate that returns the value of the specified term.

Type Parameters

T
The type of the elements of the collection.

Return Value

Double
The sum of terms evaluated for each element of collection.

Exceptions

ArgumentNullException

terms is null.

Sum(Func<Int32, Double>, Int32, Int32)

Computes the sum of an expression evaluated over the specified range.
C#
public static double Sum(
	Func<int, double> terms,
	int lowerBound,
	int upperBound
)

Parameters

terms  Func<Int32, Double>
A delegate that returns the value of the specified term.
lowerBound  Int32
The (inclusive) lower bound of the summation.
upperBound  Int32
The (exclusive) upper bound of the summation.

Return Value

Double
The sum of terms evaluated at all integers from lowerBound up to but not including upperBound.

Exceptions

ArgumentNullException

terms is null.

See Also