2축 그래프 그리기

파이썬 - 2축 그래프 그리기

import numpy as np
import matplotlib.pyplot as plt
from random import *

x = np.arange(10)
y1 = [random() for _ in x]
y2 = [uniform(1,10) for _ in x]

fig, ax1 = plt.subplots()
ax2 = ax1.twinx()

data_y1 = ax1.plot(x, y1, color='b', linestyle='-.', marker='o', label='y1')
data_y2 = ax2.plot(x, y2, color='r', linestyle='--', marker='s', label='y2')

ax1.set_xlabel('x')
ax1.set_ylabel('data_y1')
ax2.set_ylabel('data_y2')

data_y = data_y1+data_y2
labels = [l.get_label() for l in data_y]
plt.legend(data_y, labels, loc=1)

plt.show()

# 각 y축의 범위 설정 방법 

# http://blog.naver.com/PostView.nhn?blogId=onlyjeje&logNo=221168953266

ax1.set_ylim(bottom, top)

ax2.set_ylim(bottom, top)