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我有一个数据帧星火如下图所示:转换日期为月末的星火
#Create DataFrame
df <- data.frame(name = c("Thomas", "William", "Bill", "John"),
dates = c('2017-01-05', '2017-02-23', '2017-03-16', '2017-04-08'))
df <- createDataFrame(df)
#Make sure df$dates column is in 'date' format
df <- withColumn(df, 'dates', cast(df$dates, 'date'))
name | dates
--------------------
Thomas |2017-01-05
William |2017-02-23
Bill |2017-03-16
John |2017-04-08
我想改变dates
至月日结束,所以他们看起来就像如下图所示。我该怎么做呢? SparkR或PySpark代码都可以。
name | dates
--------------------
Thomas |2017-01-31
William |2017-02-28
Bill |2017-03-31
John |2017-04-30