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MongoQueryableStandardDeviationPopulationAsyncTSource Method (IMongoQueryableTSource, ExpressionFuncTSource, NullableDecimal, 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: 2.14.0+2b37a1fe1cbdbe1a020b52b77f1197b6d77575e7
Syntax
public static Task<decimal?> StandardDeviationPopulationAsync<TSource>(
	this IMongoQueryable<TSource> source,
	Expression<Func<TSource, decimal?>> selector,
	CancellationToken cancellationToken = default
)

Parameters

source
Type: MongoDB.Driver.LinqIMongoQueryableTSource
A sequence of values to calculate the population standard deviation of.
selector
Type: System.Linq.ExpressionsExpressionFuncTSource, NullableDecimal
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: TaskNullableDecimal
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