cudf.merge_sorted#
- cudf.merge_sorted(objs, keys=None, by_index=False, ignore_index=False, ascending=True, na_position='last')#
Merge a list of sorted DataFrame or Series objects.
Dataframes/Series in objs list MUST be pre-sorted by columns listed in keys, or by the index (if by_index=True).
- Parameters
- objslist of DataFrame, Series, or Index
- keyslist, default None
List of Column names to sort by. If None, all columns used (Ignored if index=True)
- by_indexbool, default False
Use index for sorting. keys input will be ignored if True
- ignore_indexbool, default False
Drop and ignore index during merge. Default range index will be used in the output dataframe.
- ascendingbool, default True
Sorting is in ascending order, otherwise it is descending
- na_position{‘first’, ‘last’}, default ‘last’
‘first’ nulls at the beginning, ‘last’ nulls at the end
- Returns
- A new, lexicographically sorted, DataFrame/Series.