matplotlib-设置坐标轴1

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代码

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import matplotlib.pyplot as plt
import numpy as np

x = np.linspace(-3, 3, 50)
y1 = 2*x + 1
y2 = x**2

plt.figure()
plt.plot(x, y2)
# plot the second curve in this figure with certain parameters
plt.plot(x, y1, color='red', linewidth=1.0, linestyle='--')

# 设置坐标轴范围
plt.xlim((-1, 2))
plt.ylim((-2, 3))

# 设置坐标轴名称
plt.xlabel('I am x')
plt.ylabel('I am y')

# 设置坐标轴间隔
new_ticks = np.linspace(-1, 2, 5)
plt.xticks(new_ticks)
# use '$ $' for math text and nice looking, e.g. '$\pi$'
plt.yticks([-2, -1.8, -1, 1.22, 3],
           [r'$really\ bad$', r'$bad$', r'$normal$', r'$good$', r'$really\ good$'])

plt.show()

结果