MongoQueryableStandardDeviationPopulationAsyncTSource Method (IMongoQueryableTSource, ExpressionFuncTSource, NullableSingle, CancellationToken) |
Computes the population standard deviation of a sequence of values that are obtained by invoking a transform function on each element of the input sequence.
Namespace:
MongoDB.Driver.Linq
Assembly:
MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.11.0+cb27a82ea70620ad1acad8058809be8302ae4f2a
Syntaxpublic static Task<Nullable<float>> StandardDeviationPopulationAsync<TSource>(
this IMongoQueryable<TSource> source,
Expression<Func<TSource, Nullable<float>>> selector,
CancellationToken cancellationToken = null
)
<ExtensionAttribute>
Public Shared Function StandardDeviationPopulationAsync(Of TSource) (
source As IMongoQueryable(Of TSource),
selector As Expression(Of Func(Of TSource, Nullable(Of Single))),
Optional cancellationToken As CancellationToken = Nothing
) As Task(Of Nullable(Of Single))
[<ExtensionAttribute>]
static member StandardDeviationPopulationAsync :
source : IMongoQueryable<'TSource> *
selector : Expression<Func<'TSource, Nullable<float32>>> *
?cancellationToken : CancellationToken
(* Defaults:
let _cancellationToken = defaultArg cancellationToken null
*)
-> Task<Nullable<float32>>
Parameters
- source
- Type: MongoDB.Driver.LinqIMongoQueryableTSource
A sequence of values to calculate the population standard deviation of. - selector
- Type: System.Linq.ExpressionsExpressionFuncTSource, NullableSingle
A transform function to apply to each element. - cancellationToken (Optional)
- Type: System.ThreadingCancellationToken
The cancellation token.
Type Parameters
- TSource
- The type of the elements of source.
Return Value
Type:
TaskNullableSingle
The population standard deviation of the sequence of values.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type
IMongoQueryableTSource. 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).
See Also