Lecture4 _ 삼각함수

#1. sin(주기1, 주파수 1), cos(주기2, 주파수 1/2)그래프 그리기

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import numpy as np

from math import pi

import matplotlib.pyplot as plt

xvals = np.linspace(-pi, pi, num=1000) #-pi와 pi사이에 1000개의 점 찍기

ysin = np.sin(2*pi*1*xvals) 

ycos = np.cos(2*pi*0.5*xvals) 

plt.plot(xvals, ysin, '*r')

plt.plot(xvals, ycos, 'sg')

plt.title('sin:red, cos:green')

plt.xlabel('Input')

plt.ylabel('Function values')

plt.axis([-pi, pi, -1, 1])

plt.grid()

plt.show()

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[Result]