Python Practice › NumPy Programs › Program 42
Find missing data
Write a NumPy program to find the missing (NaN) values in an array.
Input
[[1, 5, nan], [8, nan, 9]]
Output
[[False False True] [False True False]] 2 missing
Approach
np.isnan().
Solution
import numpy as npa = np.array([[1, 5, np.nan], [8, np.nan, 9]])print(np.isnan(a))print(np.isnan(a).sum(), "missing")Output
[[False False True] [False True False]] 2 missing
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