"Go" Python, matplotlib drawing cannot display Chinese problems

In Python, the Chinese is not displayed by default, as in the following code:

[Python]View PlainCopy

2. Import Matplotlib.pyplot as Plt
6. # define text box and arrow formatting
8. Decisionnode = dict (Boxstyle = "Sawtooth", FC = "0.8")
10. Leafnode = dict (Boxstyle = "Round4", FC = "0.8")
12. Arrow_args = dict (Arrowstyle = "<-")
16. # Draw an annotation with arrows
18. def plotnode (Nodetxt, Centerpt, PARENTPT, NodeType):
20. CreatePlot.ax1.annotate (nodetxt, xy = parentpt, xycoords = ' axes fraction ', Xytext = centerpt, textcoords = ' axes Fraction ', VA = ' center ', ha = ' center ', bbox = nodeType, arrowprops = Arrow_args)
24. Def createplot ():
26. Fig = Plt.figure (1, facecolor=' white ')
28. FIG.CLF ()
30. Createplot.ax1 = Plt.subplot (111, Frameon = False)
32. Plotnode (U' decision node ', (0.5, 0.1), (0.1, 0.5), Decisionnode)
34. Plotnode (U' leaf node ', (0.8, 0.1), (0.3, 0.8), Leafnode)
36. Plt.show ()
40. Createplot ()

Get the image as follows:

The reason for the Chinese garbled is that the default setting of the font does not have a Chinese font, so we just have to add the name of the Chinese font manually.

Manually add the following code

[Python]View PlainCopy

1. From Pylab Import *
2. mpl.rcparams[' font.sans-serif '] = [' Simhei ']

The source code is modified as follows:

[Python]View PlainCopy

2. Import Matplotlib.pyplot as Plt
6. From Pylab Import *
8. mpl.rcparams[' font.sans-serif '] = [' Simhei ']
12. # define text box and arrow formatting
14. Decisionnode = dict (Boxstyle = "Sawtooth", FC = "0.8")
16. Leafnode = dict (Boxstyle = "Round4", FC = "0.8")
18. Arrow_args = dict (Arrowstyle = "<-")
22. # Draw an annotation with arrows
24. def plotnode (Nodetxt, Centerpt, PARENTPT, NodeType):
26. CreatePlot.ax1.annotate (nodetxt, xy = parentpt, xycoords = ' axes fraction ', Xytext = centerpt, textcoords = ' axes Fraction ', VA = ' center ', ha = ' center ', bbox = nodeType, arrowprops = Arrow_args)
30. Def createplot ():
32. Fig = Plt.figure (1, facecolor=' white ')
34. FIG.CLF ()
36. Createplot.ax1 = Plt.subplot (111, Frameon = False)
38. Plotnode (U' decision node ', (0.5, 0.1), (0.1, 0.5), Decisionnode)
40. Plotnode (U' leaf node ', (0.8, 0.1), (0.3, 0.8), Leafnode)
42. Plt.show ()
44. Createplot ()

Finally get the image

Success!

Original link: http://blog.csdn.net/u013038499/article/details/52449768

"Go" Python, matplotlib drawing cannot display Chinese problems