a = np.array(...): Create a NumPy array 'a' containing the given integer values. np.unique(a, return_counts=True): Find the unique elements in the array 'a' and their counts using the np.unique function. The return_counts parameter is set to True, so the function returns two arra...
numpy.unique(arr, return_index, return_inverse, return_counts) 1. 参数说明, import numpy as np a=np.array([5,2,6,2,7,5,6,8,2,9]) print 'First array:' print a print '\n' print 'Unique values of first array:' u=np.unique(a) print u print '\n' print 'Unique array and ...
To get unique values in an array, we can use the NumPy unique function in Python. This identifies elements in an array, with options for additional functionality. Its basic use returns sorted unique values, but parameters like return_index, return_inverse, and return_counts provide indices, inv...
Series.unique(self) Returns:ndarray or ExtensionArray The unique values returned as a NumPy array. See Notes. Notes:Returns the unique values as a NumPy array. In case of an extension-array backed Series, a new ExtensionArray of that type with just the unique values is returned. This includ...
The number of times each of the unique values comes up in the original array. Only provided ifreturn_countsis True. New in version 1.9.0. See also numpy.lib.arraysetops Module with a number of other functions for performing set operations on arrays. ...
The number of times each of the unique values comes up in the original array. Only provided ifreturn_countsis True. New in version 1.9.0. See also numpy.lib.arraysetops Module with a number of other functions for performing set operations on arrays. ...
numpy.unique Find the unique elements of an array. Returns the sorted unique elements of an array. There are three optional outputs in addition to the unique elements: the indices of the input array that give the unique values, the indices of the unique array that reconstruct the input array...
DOC: correct Logo SVG files rendered in dark by Figma (numpy#24975) Nov 2, 2023 doc fix lint of DOC Mar 13, 2025 meson_cpu Loongarch: modify lsx optimization(25215PR) for newest branch Dec 20, 2024 numpy DOC: let docstring mention that unique_values is now unsorted Mar 14, 2025 requ...
# t.pyimportnumpyasnpfromnumpy.testingimportassert_array_equaldeftest_unique_value():arr=np.arange(9).reshape(3,3)expected=np.unique(arr,equal_nan=False)out=np.unique_values(arr)assert_array_equal(out,expected) Error message: ❯ pytest t.py ...
The unique() function is used to get unique values of Series object. Uniques are returned in order of appearance. Hash table-based unique, therefore does NOT sort. Syntax: Series.unique(self) Returns:ndarray or ExtensionArray The unique values returned as a NumPy array. See Notes. ...