How is plt.rcparams utilized in matplotlib?

In Matplotlib, plt.rcParams is a global parameter dictionary used to set default properties for Matplotlib. It can be used to modify various parameters for plotting, such as font size, line width, and color.

Here is how to use plt.rcParams:

import matplotlib.pyplot as plt

# 获取当前的参数字典
params = plt.rcParams

# 修改参数
params['font.size'] = 14
params['lines.linewidth'] = 2
params['figure.figsize'] = (8, 6)

# 绘制图形
plt.plot([1, 2, 3, 4, 5], [1, 4, 9, 16, 25])

# 显示图形
plt.show()

In the code above, we used plt.rcParams to access the current parameter dictionary and changed the default properties of the plot by modifying the corresponding parameters in this dictionary. In this example, we adjusted the default values for font size, line width, and figure size.

It’s important to note that modifications made to plt.rcParams are global and will affect all subsequent plotting operations. To restore the default values, you can use the plt.rcdefaults() function.

In addition, you can use plt.rcParams[‘parameter name’] to get the current value of a specific parameter, such as plt.rcParams[‘font.size’] to get the default font size.