count unique values numpy
number_list = numpy.array([1, 1, 2, 3, 4, 4, 1])
(unique, counts) = numpy.unique(number_list, return_counts=True)count unique values numpy
number_list = numpy.array([1, 1, 2, 3, 4, 4, 1])
(unique, counts) = numpy.unique(number_list, return_counts=True)python unique array of array numpy
>>> import numpy as np
>>> x = np.array([[1, 1], [2,3], [3,4]])
>>> np.unique(x)
array([1, 2, 3, 4])return position of a unique value in python array
In [304]: array = np.array([1, 1, 2, 3, 2, 1, 2, 3])
In [305]: np.unique(array) # unique values in `array`
Out[305]: array([1, 2, 3])
In [306]: array == 1 # retrieve a boolean mask where elements are equal to 1
Out[306]: array([ True, True, False, False, False, True, False, False])
In [307]: (array == 1).nonzero()[0] # get the `True` indices for the operation above
Out[307]: array([0, 1, 5])Copyright © 2021 Codeinu
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