pandas.DataFrame.last¶
-
DataFrame.
last
(offset)[source]¶ Convenience method for subsetting final periods of time series data based on a date offset.
Parameters: - offset : string, DateOffset, dateutil.relativedelta
Returns: - subset : type of 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 calender days were returned, not the last 3 observed days in the dataset, and therefore data for 2018-04-11 was not returned.