程序包 org.meteoinfo.data.dataframe.impl

接口 Function<I,O>

类型参数:

I - the type of the input values

O - the type of the output values

所有已知子接口:

Aggregate<I,O>, KeyFunction<I>, Predicate<I>, TimeFunction<I,O>, Transforms.CumulativeFunction<I,O>

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, Selection.DropNaPredicate, TimeFunctions.DayOfWeek, TimeFunctions.HourOfDay, TimeFunctions.MonthOfYear, TimeFunctions.SeasonOfYear, Transforms.CumulativeMax, Transforms.CumulativeMin, Transforms.CumulativeProduct, Transforms.CumulativeSum, Views.FillNaFunction, WindowFunction

public interface Function<I,O>

A function that is applied to objects (rows or values) in a DataFrame.

Implementors define apply(Object) to perform the desired calculation and return the result.

方法概要

限定符和类型	方法	说明
O	apply(I value)	Perform computation on the specified input value and return the result.

方法详细资料

apply

O apply(I value)

Perform computation on the specified input value and return the result.

参数:

value - the input value

返回:

the result