matplotlib例子

pyplot饼图的绘制

import matplotlib.pyplot as plt

labels = 'Frogs', 'Hogs', 'Dogs', 'Logs'
sizes = [15, 30, 45, 10]
explode = (0, 0.1, 0, 0)

plt.pie(sizes, explode=explode, labels=labels, autopct='%1.1f%%', shadow=False, startangle=90)

plt.axis('equal')
plt.show()

pyplot直方图的绘制

import numpy as np
import matplotlib.pyplot as plt

np.random.seed(0)
mu, sigma = 100, 20
a = np.random.normal(mu, sigma,size=100)

plt.hist(a, 40, normed=1, histtype='stepfilled', facecolor='b', alpha=0.75)
plt.title('Histogram')

plt.show()

pyplot极坐标图的绘制

import numpy as np
import matplotlib.pyplot as plt

N = 20
theta = np.linspace(0.0, 2*np.pi, N, endpoint=False)
radii = 10*np.random.rand(N)
width = np.pi / 4 * np.random.rand(N)

ax = plt.subplot(111,projection='polar')
bars = ax.bar(theta, radii, width=width, bottom=0.0)

for r, bar in zip(radii, bars):
    bar.set_facecolor(plt.cm.viridis(r / 10.))
    bar.set_alpha(0.5)

plt.show()

 pyplot散点图的绘制

import numpy as np
import matplotlib.pyplot as plt

fig, ax = plt.subplots()
ax.plot(10*np.random.random(100),10*np.random.rand(100),'o')
ax.set_title('Simple Scatter')

plt.show()