matplotlib Chinese character display method

How to display Chinese characters in matplotlib requires specific code examples

When using Matplotlib for data visualization, many times we need to display Chinese characters in charts. However, since Matplotlib does not support displaying Chinese characters by default, some additional settings are required to achieve this function. Below we will introduce a simple method using which you can easily display Chinese characters in Matplotlib.

First, we need to import the necessary libraries, including Matplotlib and Chinese font library. The code is as follows:

import matplotlib.pyplot as plt
from matplotlib.font_manager import FontProperties

The second step is to choose the appropriate Chinese font. In Matplotlib, the default font is English font, which cannot display Chinese characters correctly. We can select the appropriate Chinese font through the following code:

font = FontProperties(fname=r"C:WindowsFontssimhei.ttf", size=14)

In the above code, we use the FontProperties class to specify the path of the font file, simhei.ttf is A commonly used Chinese font, here I put it in the Fonts folder of the Windows system. You can choose the appropriate Chinese font according to your own system environment.

The third step is to use the selected Chinese font to draw the chart. In Matplotlib, we can display Chinese characters by calling the text function or xlabel, ylabel and other functions. The code example is as follows:

fig = plt.figure()
ax = fig.add_subplot(111)

ax.text(0.5, 0.5, '中文字符示例', fontproperties=font)

In the above code, we created a chart object fig and added a subgraph object ax. Then, we use the text function to add a piece of text in the center of the chart. The text content is "Chinese Character Example" and the font used is specified through the fontproperties parameter.

In addition to the text function, we can also use functions such as xlabel and ylabel to display Chinese characters. The code example is as follows:

fig = plt.figure()
ax = fig.add_subplot(111)

ax.set_xlabel('横轴', fontproperties=font)
ax.set_ylabel('纵轴', fontproperties=font)

In the above code, we set the labels of the horizontal axis and the vertical axis respectively through the set_xlabel and set_ylabel functions, and through the fontproperties The parameter specifies the font to use.

Through the above steps, we can easily display Chinese characters in Matplotlib. The complete sample code is given below:

import matplotlib.pyplot as plt
from matplotlib.font_manager import FontProperties

font = FontProperties(fname=r"C:WindowsFontssimhei.ttf", size=14)

fig = plt.figure()
ax = fig.add_subplot(111)

ax.text(0.5, 0.5, '中文字符示例', fontproperties=font)

plt.show()

By running the above code, we can see that Chinese characters are displayed correctly in the chart drawn by Matplotlib.

To summarize, the steps to display Chinese characters in Matplotlib are as follows:

1. Import the necessary libraries: import matplotlib.pyplot as plt,from matplotlib.font_manager import FontProperties；
2. Select the appropriate Chinese font: font = FontProperties(fname=r"C:WindowsFontssimhei.ttf", size=14)；
3. Use the selected Chinese font to draw the chart: ax.text(0.5, 0.5, 'Chinese character example', fontproperties=font)or ax.set_xlabel('horizontal axis' , fontproperties=font), etc.

The above is the method and sample code for displaying Chinese characters in Matplotlib. With this method, we can easily display Chinese characters in Matplotlib, making the chart easier to understand and read. Hope this article is helpful to you!

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