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2022-09-02 06:06:11 -04:00
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Book4_Ch01_Python_Codes/Bk4_Ch1_04.py
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###############
# Authored by Weisheng Jiang
# Book 4 | From Basic Arithmetic to Machine Learning
# Published and copyrighted by Tsinghua University Press
# Beijing, China, 2022
###############
# Bk4_Ch1_04.py
import numpy as np
# define two column vectors
a = np.array([[-2], [5]])
b = np.array([[5], [-1]])
# calculate vector addition
a_plus_b = a + b
a_plus_b_2 = np.add(a,b)
# calculate vector subtraction
a_minus_b = a - b
a_minus_b_2 = np.subtract(a,b)
b_minus_a = b - a
b_minus_a_2 = np.subtract(b,a)