xarray.Dataset.map¶
-
Dataset.
map
(func, keep_attrs=None, args=(), **kwargs)¶ Apply a function to each variable in this dataset
- Parameters
func (
callable()
) – Function which can be called in the form func(x, *args, **kwargs) to transform each DataArray x in this dataset into another DataArray.keep_attrs (
bool
, optional) – If True, the dataset’s attributes (attrs) will be copied from the original object to the new one. If False, the new object will be returned without attributes.args (
tuple
, optional) – Positional arguments passed on to func.**kwargs (
Any
) – Keyword arguments passed on to func.
- Returns
applied – Resulting dataset from applying
func
to each data variable.- Return type
Examples
>>> da = xr.DataArray(np.random.randn(2, 3)) >>> ds = xr.Dataset({"foo": da, "bar": ("x", [-1, 2])}) >>> ds <xarray.Dataset> Dimensions: (dim_0: 2, dim_1: 3, x: 2) Dimensions without coordinates: dim_0, dim_1, x Data variables: foo (dim_0, dim_1) float64 1.764 0.4002 0.9787 2.241 1.868 -0.9773 bar (x) int64 -1 2 >>> ds.map(np.fabs) <xarray.Dataset> Dimensions: (dim_0: 2, dim_1: 3, x: 2) Dimensions without coordinates: dim_0, dim_1, x Data variables: foo (dim_0, dim_1) float64 1.764 0.4002 0.9787 2.241 1.868 0.9773 bar (x) float64 1.0 2.0