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SeanSyue/numpy_count_occurrence.py

Last active May 20, 2018 15:32
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Count the occurrence of certain item in an ndarray in Python. Ref: https://stackoverflow.com/a/28663910/8809592
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numpy_count_occurrence.py
import numpy as np
a = np.array([0, 3, 0, 1, 0, 1, 2, 1, 0, 0, 0, 0, 1, 3, 4])
unique, counts = numpy.unique(a, return_counts=True)
print(dict(zip(unique, counts)))
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