pandas.Series.last — pandas 2.2.3 documentation (original) (raw)

Series.last(offset)[source]#

Select final periods of time series data based on a date offset.

Deprecated since version 2.1: last() is deprecated and will be removed in a future version. Please create a mask and filter using .loc instead.

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, ‘3D’ 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.

Notes

Deprecated since version 2.1.0: Please create a mask and filter using .loc instead

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.