CODEWITHSUNDEEP
pythonnumpy
gzc
gzc

Reputation: 8609

numpy divide by zero results

When divide different dividends by zero, I got different results.

arr = np.array([0.0, 1.0, -0.1])
print(arr/0)

The results are following

[ nan  inf -inf]

Why? I expect the results were all nan.

BTW, I got two types of warning.

__main__:1: RuntimeWarning: divide by zero encountered in divide
__main__:1: RuntimeWarning: invalid value encountered in divide

Upvotes: 2

Views: 2246

Answers (1)

Sangeon Park
Sangeon Park

Reputation: 188

IEEE 754 defines division by zero as follows:

a ÷ +0 is positive infinity when a is positive, negative infinity when a is negative, and NaN when a = ±0.

Source: https://en.wikipedia.org/wiki/Division_by_zero#Computer_arithmetic

Upvotes: 3

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