np.where for 2 conditions code example

Example 1: Numpy where function multiple conditions

dists[(dists >= r) & (dists <= r+dr)]

# or if you want to use np.where #

dists[(np.where((dists >= r) & (dists <= r + dr)))]

Example 2: np.where

>>> a = np.arange(10)
>>> a
array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9])
>>> np.where(a < 5, a, 10*a)
array([ 0,  1,  2,  3,  4, 50, 60, 70, 80, 90])