程序包 org.meteoinfo.data.dataframe

类 DataFrameGroupBy

java.lang.Object

org.meteoinfo.data.dataframe.GroupBy

org.meteoinfo.data.dataframe.DataFrameGroupBy

public class DataFrameGroupBy
extends GroupBy

作者:

Yaqiang Wang

字段概要

从类继承的字段 org.meteoinfo.data.dataframe.GroupBy

groups

构造器概要

构造器

构造器	说明
DataFrameGroupBy(Grouping groups, DataFrame dataFrame)	Constructor

方法概要

限定符和类型	方法	说明
<V> DataFrame	apply(Function<?,?> function)
DataFrame	count()	Compute the sum of the numeric columns for each group.
DataFrame	max()	Compute the Maximum of the numeric columns for each group.
DataFrame	mean()	Compute the mean of the numeric columns for each group.
DataFrame	median()	Compute the median of the numeric columns for each group.
DataFrame	min()	Compute the minimum of the numeric columns for each group.
DataFrame	percentile(double quantile)	Compute the percentile of the numeric columns for each group.
DataFrame	stdDev()	Compute the standard deviation of the numeric columns for each group.
DataFrame	sum()	Compute the sum of the numeric columns for each group.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

DataFrameGroupBy

public DataFrameGroupBy(Grouping groups,
                        DataFrame dataFrame)

Constructor

参数:

groups - The groups

dataFrame - The data frame

方法详细资料

apply

public <V> DataFrame apply(Function<?,?> function)

count

public DataFrame count()

Compute the sum of the numeric columns for each group.

指定者:

count 在类中 GroupBy

返回:

the new data frame

sum

public DataFrame sum()

Compute the sum of the numeric columns for each group.

指定者:

sum 在类中 GroupBy

返回:

the new data frame

mean

public DataFrame mean()

Compute the mean of the numeric columns for each group.

指定者:

mean 在类中 GroupBy

返回:

the new data frame

min

public DataFrame min()

Compute the minimum of the numeric columns for each group.

指定者:

min 在类中 GroupBy

返回:

the new data frame

max

public DataFrame max()

Compute the Maximum of the numeric columns for each group.

指定者:

max 在类中 GroupBy

返回:

the new data frame

median

public DataFrame median()

Compute the median of the numeric columns for each group.

指定者:

median 在类中 GroupBy

返回:

the new data frame

stdDev

public DataFrame stdDev()

Compute the standard deviation of the numeric columns for each group.

指定者:

stdDev 在类中 GroupBy

返回:

the new dataframe

percentile

public DataFrame percentile(double quantile)

Compute the percentile of the numeric columns for each group.

指定者:

percentile 在类中 GroupBy

参数:

quantile - Quantile value

返回:

the new dataframe