# xarray.core.groupby.DatasetGroupBy.fillna¶

DatasetGroupBy.fillna(value)

Fill missing values in this object by group.

This operation follows the normal broadcasting and alignment rules that xarray uses for binary arithmetic, except the result is aligned to this object (join='left') instead of aligned to the intersection of index coordinates (join='inner').

Parameters
valuevalid type for the grouped object’s fillna method

Used to fill all matching missing values by group.

Returns
same type as the grouped object

Dataset.fillna, DataArray.fillna