# -*- coding: utf-8 -*-

"""

设置

"""

import matplotlib.pyplot as plt

import numpy as np

# 绘制普通图像

x = np.linspace(-1, 1, 50)

y1 = 2 * x + 1

y2 = x**2

plt.figure()

# 在绘制时设置lable, 逗号是必须的

l1, = plt.plot(x, y1, label = 'line')

l2, = plt.plot(x, y2, label = 'parabola', color = 'red', linewidth = 1.0, linestyle = '--')

# 设置坐标轴的取值范围

plt.xlim((-1, 1))

plt.ylim((0, 2))

# 设置坐标轴的lable

plt.xlabel('X')

plt.ylabel('Y')

# 设置x坐标轴刻度, 原来为0.25, 修改后为0.5

plt.xticks(np.linspace(-1, 1, 5))

# 设置y坐标轴刻度及标签, $$是设置字体

plt.yticks([0, 0.5], ['$minimum$', 'normal'])

# 设置legend

plt.legend(handles = [l1, l2,], labels = ['a', 'b'], loc = 'best')

plt.show()