Click or drag to resize
Accord.NET (logo)

MeasuresWeightedStandardDeviation Method (Double, Double, Double, Boolean, WeightType)
Computes the Standard Deviation of the given values.

Namespace:  Accord.Statistics
Assembly:  Accord.Math (in Accord.Math.dll) Version: 3.8.0
Syntax
Copy
public static double WeightedStandardDeviation(
	this double[] values,
	double[] weights,
	double mean,
	bool unbiased,
	WeightType weightType = WeightType.Fraction
)
Request Example View Source

Parameters

values
Type: SystemDouble
A double array containing the vector members.
weights
Type: SystemDouble
An unit vector containing the importance of each sample in . The sum of this array elements should add up to 1.
mean
Type: SystemDouble
The mean of the vector, if already known.
unbiased
Type: SystemBoolean
Pass true to compute the sample variance; or pass false to compute the population variance. For integers weights , the bias correction is equivalent to the non-weighted case. For fractional weights, the variance bias cannot be completely eliminated.
weightType (Optional)
Type: Accord.StatisticsWeightType
How the weights should be interpreted for the bias correction.

Return Value

Type: Double
The standard deviation of the given data.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type . 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