Given a numpy array
import numpy as np
from numpy.random import random
N = 5
x = random(N)
How to randomly multiply a subset of (some of the elements in) x by -1 in order to change the sign of some of the elements in the array?
Given a numpy array
import numpy as np
from numpy.random import random
N = 5
x = random(N)
How to randomly multiply a subset of (some of the elements in) x by -1 in order to change the sign of some of the elements in the array?
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