setdiff1d(ar1, ar2, assume_unique=False)
Return the unique values in :None:None:`ar1` that are not in :None:None:`ar2`.
Input array.
Input comparison array.
If True, the input arrays are both assumed to be unique, which can speed up the calculation. Default is False.
1D array of values in :None:None:`ar1` that are not in :None:None:`ar2`. The result is sorted when :None:None:`assume_unique=False`, but otherwise only sorted if the input is sorted.
Find the set difference of two arrays.
numpy.lib.arraysetops
Module with a number of other functions for performing set operations on arrays.
>>> a = np.array([1, 2, 3, 2, 4, 1])See :
... b = np.array([3, 4, 5, 6])
... np.setdiff1d(a, b) array([1, 2])
The following pages refer to to this document either explicitly or contain code examples using this.
numpy.ma.extras.setdiff1d
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