减去下一行使用当前行，python数据帧

Question

我在python中有这个Pandas Dataframe，我想知道两行之间的时差，下一行减去前一行，我该如何处理？

已审核[x] - 已审核[x-1] x是该行

的位置数

   ReporterID        ID      Type                   Reviewed
0     27545252  51884791  ReportID 2015-01-14 00:00:42.640000
1     29044639  51884792  ReportID 2015-01-14 00:00:02.767000
2     29044639  51884793  ReportID 2015-01-14 00:00:28.173000
3     29044639  51884794  ReportID 2015-01-14 00:00:46.300000
4     27545252  51884796  ReportID 2015-01-14 00:01:54.293000
5     29044639  51884797  ReportID 2015-01-14 00:01:17.400000
6     29044639  51884798  ReportID 2015-01-14 00:01:57.600000

Answer 1

假设您的Reviewed列是日期时间，您可以这样做：

df.ix[4, 'Reviewed'] - df.ix[3, 'Reviewed']

如果您想一次为所有行执行此操作：

df['Reviewed'] - df['Reviewed'].shift()