last(self: 'NDFrameT', offset) -> 'NDFrameT'
For a DataFrame with a sorted DatetimeIndex, this function selects the last few rows based on a date offset.
The offset length of the data that will be selected. For instance, '3D' will display all the rows having their index within the last 3 days.
If the index is not a DatetimeIndex
A subset of the caller.
Select final periods of time series data based on a date offset.
at_time
Select values at a particular time of the day.
between_time
Select values between particular times of the day.
first
Select initial periods of time series based on a date offset.
>>> i = pd.date_range('2018-04-09', periods=4, freq='2D')
... ts = pd.DataFrame({'A': [1, 2, 3, 4]}, index=i)
... ts A 2018-04-09 1 2018-04-11 2 2018-04-13 3 2018-04-15 4
Get the rows for the last 3 days:
This example is valid syntax, but we were not able to check execution>>> ts.last('3D') A 2018-04-13 3 2018-04-15 4
Notice the data for 3 last calendar days were returned, not the last 3 observed days in the dataset, and therefore data for 2018-04-11 was not returned.
See :The following pages refer to to this document either explicitly or contain code examples using this.
pandas.core.generic.NDFrame.between_time
pandas.core.generic.NDFrame.first
pandas.core.generic.NDFrame.at_time
pandas.core.generic.NDFrame.sort_values
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