<pre><code>import matplotlib.pyplot as plt
fig = plt.figure()
patterns = [ "/" , "\\" , "|" , "-" , "+" , "x", "o", "O", ".", "*" ]
ax1 = fig.add_subplot(111)
for i in range(len(patterns)):
ax1.bar(i, 3, color='red', edgecolor='black', hatch=patterns[i])
plt.show()
</code></pre>
<p><img src="https://i.imgur.com/09eY6.png" alt="enter image description here"/></p>
<p>它在文档<a href="https://matplotlib.org/api/_as_gen/matplotlib.patches.Patch.html#matplotlib.patches.Patch.set_hatch" rel="noreferrer">here</a>中。</p>
<p>好的-所以要制作一个饼图,你需要这样做:</p>
<p>如果你看<a href="http://matplotlib.org/api/pyplot_api.html?highlight=pie#matplotlib.pyplot.pie" rel="noreferrer">here</a>:</p>
<pre><code>Return value:
If autopct is None, return the tuple (patches, texts):
patches is a sequence of matplotlib.patches.Wedge instances
texts is a list of the label matplotlib.text.Text instances.
</code></pre>
<p>然后我们查看<a href="http://matplotlib.org/api/artist_api.html#matplotlib.patches.Wedge" rel="noreferrer">Wedges</a>页面,发现它有一个set_hatch()方法。</p>
<p>所以我们只需要在piechart演示中添加几行。。。</p>
<p>例1:</p>
<pre><code>import matplotlib.pyplot as plt
fig = plt.figure()
patterns = [ "/" , "\\" , "|" , "-" , "+" , "x", "o", "O", ".", "*" ]
ax1 = fig.add_subplot(111)
for i in range(len(patterns)):
ax1.bar(i, 3, color='red', edgecolor='black', hatch=patterns[i])
plt.show()
</code></pre>
<p>例2:</p>
<pre><code>"""
Make a pie chart - see
http://matplotlib.sf.net/matplotlib.pylab.html#-pie for the docstring.
This example shows a basic pie chart with labels optional features,
like autolabeling the percentage, offsetting a slice with "explode",
adding a shadow, and changing the starting angle.
"""
from pylab import *
import math
import numpy as np
patterns = [ "/" , "\\" , "|" , "-" , "+" , "x", "o", "O", ".", "*" ]
def little_pie(breakdown,location,size):
breakdown = [0] + list(np.cumsum(breakdown)* 1.0 / sum(breakdown))
for i in xrange(len(breakdown)-1):
x = [0] + np.cos(np.linspace(2 * math.pi * breakdown[i], 2 * math.pi *
breakdown[i+1], 20)).tolist()
y = [0] + np.sin(np.linspace(2 * math.pi * breakdown[i], 2 * math.pi *
breakdown[i+1], 20)).tolist()
xy = zip(x,y)
scatter( location[0], location[1], marker=(xy,0), s=size, facecolor=
['gold','yellow', 'orange', 'red','purple','indigo','violet'][i%7])
figure(1, figsize=(6,6))
little_pie([10,3,7],(1,1),600)
little_pie([10,27,4,8,4,5,6,17,33],(-1,1),800)
fracs = [10, 8, 7, 10]
explode=(0, 0, 0.1, 0)
piechart = pie(fracs, explode=explode, autopct='%1.1f%%')
for i in range(len(piechart[0])):
piechart[0][i].set_hatch(patterns[(i)%len(patterns)])
show()
</code></pre>
<p><img src="https://i.stack.imgur.com/Vbyfq.png" alt="enter image description here"/></p>