接口 Aggregate<I,O>
-
- 类型参数:
I- the type of the input valuesO- the type of the result
- 所有已知实现类:
Aggregation.Collapse,Aggregation.Count,Aggregation.Describe,Aggregation.Kurtosis,Aggregation.Max,Aggregation.Mean,Aggregation.Median,Aggregation.Min,Aggregation.Percentile,Aggregation.Product,Aggregation.Skew,Aggregation.StdDev,Aggregation.Sum,Aggregation.Unique,Aggregation.Variance
public interface Aggregate<I,O> extends Function<List<I>,O>
A function that converts lists of data frame values to aggregate results.Implementors define
Function.apply(Object)to accept a list of data frame values as input and return an aggregate result.