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abs_max = np.amax(np.abs(unnormalized_array))
normalized_array = unnormalized_array * (4.0 / abs_max)
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import numpy as np
# Create an array
arr = np.array([1, 2, 3, 4, 5])
# Scale the array by multiplying with a scalar value
scaled_arr = arr * 2
print(scaled_arr)