EdmFunctions.VarP Method (DbExpression)

 

Creates a DbFunctionExpression that invokes the canonical 'VarP' function over the population of the specified collection. The result type of the expression Edm.Double.

Namespace:   System.Data.Entity.Core.Common.CommandTrees.ExpressionBuilder
Assembly:  EntityFramework (in EntityFramework.dll)

public static DbFunctionExpression VarP(
	this DbExpression collection
)

Parameters

collection
Type: System.Data.Entity.Core.Common.CommandTrees.DbExpression

An expression that specifies the collection for which the statistical variance should be computed.

Return Value

Type: System.Data.Entity.Core.Common.CommandTrees.DbFunctionExpression

A new DbFunctionExpression that produces the statistical variance value.

Exception Condition
ArgumentNullException

collection is null.

ArgumentException

No overload of the canonical 'VarP' function accepts an argument with the result type of collection.