NumPy: Convert angles from radians to degrees for all elements in a given array
Write a NumPy program to convert angles from radians to degrees for all elements in a given array.
Sample Input: [-np.pi, -np.pi/2, np.pi/2, np.pi]
Sample Solution:
Python Code:
# Importing the NumPy library
import numpy as np
# Creating an array of angles in radians: [-π, -π/2, π/2, π]
x = np.array([-np.pi, -np.pi/2, np.pi/2, np.pi])
# Converting angles from radians to degrees using np.degrees()
r1 = np.degrees(x)
# Converting angles from radians to degrees using np.rad2deg()
r2 = np.rad2deg(x)
# Checking if the results from np.degrees() and np.rad2deg() are equivalent
assert np.array_equiv(r1, r2)
# Printing the converted angles in degrees
print(r1)
Sample Output:
[-180. -90. 90. 180.]
Explanation:
x = np.array([-np.pi, -np.pi/2, np.pi/2, np.pi]): This code defines a numpy array x containing four angles in radians: -π, -π/2, π/2, and π.
r1 = np.degrees(x): The np.degrees() function is used to convert the angles in x to degrees, resulting in a new array r1 where each angle in x has been converted to its equivalent in degrees.
r2 = np.rad2deg(x): This code is used to perform the same conversion from radians to degrees, resulting in a new array r2.
assert np.array_equiv(r1, r2): Finally, the np.array_equiv() function is used to check if the two arrays r1 and r2 have the same values. If the arrays are equivalent, the assertion will pass without an error.
Python-Numpy Code Editor: