cudf.DataFrame.last#

DataFrame.last(offset)[source]#

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

When having a DataFrame with sorted dates as index, this function can select the last few rows based on a date offset.

Parameters:

offset: str: The offset length of the data that will be selected. For instance, ‘3D’ will display all 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

Examples

>>> i = cudf.date_range('2018-04-09', periods=4, freq='2D')
>>> ts = cudf.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
>>> ts.last('3D')
            A
2018-04-13  3
2018-04-15  4