dask.array.union1d

dask.array.union1d¶

dask.array.union1d(ar1, ar2)[source]¶

Find the union of two arrays.

This docstring was copied from numpy.union1d.

Some inconsistencies with the Dask version may exist.

Return the unique, sorted array of values that are in either of the two input arrays.

Parameters

ar1, ar2array_like: Input arrays. They are flattened if they are not already 1D.

Returns

See also

numpy.lib.arraysetops: Module with a number of other functions for performing set operations on arrays.

Examples

>>> np.union1d([-1, 0, 1], [-2, 0, 2])  
array([-2, -1,  0,  1,  2])

To find the union of more than two arrays, use functools.reduce:

>>> from functools import reduce  
>>> reduce(np.union1d, ([1, 3, 4, 3], [3, 1, 2, 1], [6, 3, 4, 2]))  
array([1, 2, 3, 4, 6])

dask.array.trunc

dask.array.unique