xarray.core.groupby.DataArrayGroupBy.sum¶
-
DataArrayGroupBy.
sum
(dim=None, axis=None, skipna=None, **kwargs)¶ Reduce this DataArrayGroupBy’s data by applying sum along some dimension(s).
- Parameters
dim (
str
or sequence ofstr
, optional) – Dimension(s) over which to apply sum.axis (
int
or sequence ofint
, optional) – Axis(es) over which to apply sum. Only one of the ‘dim’ and ‘axis’ arguments can be supplied. If neither are supplied, then sum is calculated over axes.skipna (
bool
, optional) – If True, skip missing values (as marked by NaN). By default, only skips missing values for float dtypes; other dtypes either do not have a sentinel missing value (int) or skipna=True has not been implemented (object, datetime64 or timedelta64).min_count (
int
, default:None
) – The required number of valid values to perform the operation. If fewer than min_count non-NA values are present the result will be NA. New in version 0.10.8: Added with the default being None.keep_attrs (
bool
, optional) – If True, the attributes (attrs) will be copied from the original object to the new one. If False (default), the new object will be returned without attributes.**kwargs (
dict
) – Additional keyword arguments passed on to the appropriate array function for calculating sum on this object’s data.
- Returns
reduced – New DataArrayGroupBy object with sum applied to its data and the indicated dimension(s) removed.
- Return type