【Python】How to find the most frequent value in a numpy array? - 101 Numpy Exercises

Q:

irisのpetal lengthで最も出現頻度が高い値を見つけなさい

A:

# Input:
url = 'https://archive.ics.uci.edu/ml/machine-learning-databases/iris/iris.data'
iris = np.genfromtxt(url, delimiter=',', dtype='object')

# Solution:
vals, counts = np.unique(iris[:, 3], return_counts=True)
print(vals[np.argmax(counts)])
#> b'0.2'

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