public static class Aggregators

<ExtensionAttribute>
Public NotInheritable Class Aggregators

[ExtensionAttribute]
public ref class Aggregators abstract sealed

[<AbstractClassAttribute>]
[<SealedAttribute>]
[<ExtensionAttribute>]
type Aggregators =  class end

The Aggregators type exposes the following members.

	Name	Description
	Correlation	Gets an aggregator that computes the standard deviation.
	Count	Gets an aggregator that computes the number of non-missing values.
	CountUnique	Gets an aggregator that computes the number of non-missing values.
	Covariance	Gets an aggregator that computes the variance.
	ExactSum	Gets an aggregator that computes the sum. The result is returned as a value of the same type.
	First	Gets an aggregator that returns the first non-missing value.
	FirstQuartile	Gets an aggregator that computes the first quartile.
	Kurtosis	Gets an aggregator that computes the kurtosis.
	Last	Gets an aggregator that returns the last non-missing value.
	Max	Gets an aggregator that computes the largest value.
	Mean	Gets an aggregator that computes the mean.
	Median	Gets an aggregator that computes the median.
	Min	Gets an aggregator that computes the smallest value.
	Mode	Gets an aggregator that computes the number of non-missing values.
	Range	Gets an aggregator that computes the largest value.
	Skewness	Gets an aggregator that computes the skewness.
	StandardDeviation	Gets an aggregator that computes the standard deviation.
	Sum	Gets an aggregator that computes the sum and returns the result as a Double.
	ThirdQuartile	Gets an aggregator that computes the third quartile.
	Variance	Gets an aggregator that computes the variance.
	WeightedMean	Gets an aggregator that computes the mean of a sequence weighted by another sequence.
	WeightedStandardDeviation	Gets an aggregator that computes the standard deviation of a sequence weighted by another sequence.
	WeightedVariance	Gets an aggregator that computes the variance of a sequence weighted by another sequence.

	Name	Description
	CreateU, T(String, FuncVectorU, T)	Constructs a new aggregator group from a function.
	CreateU, T(String, FuncVectorU, VectorU, T)	Constructs a new aggregator group from a function.
	Quantile	Gets an aggregator that computes the specified quantile.
	Skip	Gets an aggregator that returns the first non-missing value after skipping the specified number of values.

Use the Aggregators class to access many common aggregation functions. Most aggregators are returned as Aggregator2Group objects, which means they can be used on untyped data frame columns.

Use the Aggregators class to access many common aggregation functions. Most aggregators are returned as AggregatorGroup objects, which means they can be used on untyped data frame columns.

Numerical Libraries

Reference