Conditional Selection with Numpy

2021-02-01

Conditional Selection with Numpy

One neat feature, which is expanded on in Pandas as well, is conditional selection. In a numpy array, we can use the where method to pass a conditional to select items in an array. In this article, we will look at a quick example of how to select elements conditionally.

arr = np.array([1, 2, 3, 4, 5])

## Select all elements less than 4
np.where(arr < 4)
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