How do I remove NaN values from a NumPy array?

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To remove NaN values from a NumPy array x:

x = x[~numpy.isnan(x)]
Explanation

The inner function numpy.isnan returns a boolean/logical array which has the value True everywhere that x is not-a-number. Since we want the opposite, we use the logical-not operator ~ to get an array with Trues everywhere that x is a valid number.

Lastly, we use this logical array to index into the original array x, in order to retrieve just the non-NaN values.

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