numpy count unique code example

Example 1: numpy array count frequency

import numpy as np

x = np.array([1,1,1,2,2,2,5,25,1,1])
unique, counts = np.unique(x, return_counts=True)

print np.asarray((unique, counts)).T

Example 2: np array value count

unique_elements, counts_elements = np.unique(a, return_counts=True)

Example 3: python .unique()

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