QueryableExtensionMethodsStandardDeviationAsyncTSource, TColumnType Method (IQueryableTSource, ExpressionFuncTSource, TColumnType) |
Async variant of StandardDeviation.
Namespace:
SD.LLBLGen.Pro.LinqSupportClasses
Assembly:
SD.LLBLGen.Pro.ORMSupportClasses (in SD.LLBLGen.Pro.ORMSupportClasses.dll) Version: 5.9.0.0 (5.9.0)
Syntax public static Task<double> StandardDeviationAsync<TSource, TColumnType>(
this IQueryable<TSource> source,
Expression<Func<TSource, TColumnType>> selector
)
<ExtensionAttribute>
Public Shared Function StandardDeviationAsync(Of TSource, TColumnType) (
source As IQueryable(Of TSource),
selector As Expression(Of Func(Of TSource, TColumnType))
) As Task(Of Double)
Parameters
- source
- Type: System.LinqIQueryableTSource
The source. - selector
- Type: System.Linq.ExpressionsExpressionFuncTSource, TColumnType
The selector.
Type Parameters
- TSource
- The type of the source.
- TColumnType
- The type of the column type.
Return Value
Type:
TaskDouble
The standard deviation over the values in the column specified by selector.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type
IQueryableTSource. When you use instance method syntax to call this method, omit the first parameter. For more information, see
Extension Methods (Visual Basic) or
Extension Methods (C# Programming Guide).
Remarks
doesn't apply DISTINCT. If you want the standard deviation over only distinct values, use the overload which accepts a boolean.
See Also