/Python/How to find unique values in numpy array

How to find unique values in numpy array

Count unique values numpy

number_list = numpy.array([1, 1, 2, 3, 4, 4, 1])
(unique, counts) = numpy.unique(number_list, return_counts=True)

Source: kite.com

How to find unique values in numpy array

>>> a = np.array([1, 2, 6, 4, 2, 3, 2])
>>> u, indices = np.unique(a, return_inverse=True)
>>> u
array([1, 2, 3, 4, 6])
>>> indices
array([0, 1, 4, 3, 1, 2, 1])
>>> u[indices]
array([1, 2, 6, 4, 2, 3, 2])

Source: numpy.org

How to find unique values in numpy array

>>> a = np.array([1, 2, 6, 4, 2, 3, 2])
>>> values, counts = np.unique(a, return_counts=True)
>>> values
array([1, 2, 3, 4, 6])
>>> counts
array([1, 3, 1, 1, 1])
>>> np.repeat(values, counts)
array([1, 2, 2, 2, 3, 4, 6])    # original order not preserved

Source: numpy.org

How to find unique values in numpy array

>>> a = np.array([[1, 0, 0], [1, 0, 0], [2, 3, 4]])
>>> np.unique(a, axis=0)
array([[1, 0, 0], [2, 3, 4]])

Source: numpy.org

How to find unique values in numpy array

>>> np.unique([1, 1, 2, 2, 3, 3])
array([1, 2, 3])
>>> a = np.array([[1, 1], [2, 3]])
>>> np.unique(a)
array([1, 2, 3])

Source: numpy.org

How to find unique values in numpy array

>>> a = np.array(['a', 'b', 'b', 'c', 'a'])
>>> u, indices = np.unique(a, return_index=True)
>>> u
array(['a', 'b', 'c'], dtype='<U1')
>>> indices
array([0, 1, 3])
>>> a[indices]
array(['a', 'b', 'c'], dtype='<U1')

Source: numpy.org

Similar codes

3 votes277 views2 answers
Find frequency of numbers in list python
Python
0 vote269 views1 answer
How to do disconnect command on member in discord python
Python
-1 vote307 views1 answer
Python serial port
Python
0 vote256 views1 answer
Get value of bit in integer python
Python
1 vote258 views1 answer
Python catch sigterm
Python
9 votes273 views2 answers
Creata daframe python
Python
2 votes263 views1 answer
Tkinter execute function on enter
Python
62 votes263 views4 answers
Shuffle list
Python
6 votes281 views2 answers
Python debugger online
Python
57 votes272 views5 answers
Python access index in for loop
Python