xarray.Dataset.set_index

Dataset.set_index(indexes=None, append=False, inplace=None, **indexes_kwargs)

Set Dataset (multi-)indexes using one or more existing coordinates or variables.

Parameters:
indexes : {dim: index, …}

Mapping from names matching dimensions and values given by (lists of) the names of existing coordinates or variables to set as new (multi-)index.

append : bool, optional

If True, append the supplied index(es) to the existing index(es). Otherwise replace the existing index(es) (default).

inplace : bool, optional

If True, set new index(es) in-place. Otherwise, return a new Dataset object.

**indexes_kwargs: optional

The keyword arguments form of indexes. One of indexes or indexes_kwargs must be provided.

Returns:
obj : Dataset

Another dataset, with this dataset’s data but replaced coordinates.