pandas.Series.last#
- Series.last(offset)[source]#
Select final periods of time series data based on a date offset.
For a DataFrame with a sorted DatetimeIndex, this function selects the last few rows based on a date offset.
- Parameters
- offsetstr, DateOffset, dateutil.relativedelta
The offset length of the data that will be selected. For instance, ā3Dā will display all the rows having their index within the last 3 days.
- Returns
- Series or DataFrame
A subset of the caller.
- Raises
- TypeError
If the index is not a
DatetimeIndex
See also
first
Select initial periods of time series 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.
Examples
>>> 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:
>>> 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.