In [1]:

from matplotlib import rcParams
from matplotlib.font_manager import findfont, FontProperties

rcParams['font.family'] = 'sans-serif'
rcParams['font.sans-serif'] = ['Noto Sans CJK SC', 'WenQuanYi Zen Hei']  # 只放存在的
rcParams['axes.unicode_minus'] = False

# 验证 Matplotlib 实际选中的字体路径（应该不再是 DejaVu Sans）
print(findfont(FontProperties(family=rcParams['font.sans-serif'])))

from matplotlib import rcParams from matplotlib.font_manager import findfont, FontProperties rcParams['font.family'] = 'sans-serif' rcParams['font.sans-serif'] = ['Noto Sans CJK SC', 'WenQuanYi Zen Hei'] # 只放存在的 rcParams['axes.unicode_minus'] = False # 验证 Matplotlib 实际选中的字体路径（应该不再是 DejaVu Sans） print(findfont(FontProperties(family=rcParams['font.sans-serif'])))

/usr/share/fonts/truetype/wqy/wqy-zenhei.ttc

实验 001 · 正弦曲线与统计直方图¶

In [2]:

import numpy as np, matplotlib.pyplot as plt
x = np.linspace(0, 2*np.pi, 400)
y = np.sin(x)
plt.plot(x, y)
plt.title('sin(x)')
plt.xlabel('x'); plt.ylabel('sin x')
plt.show()

import numpy as np, matplotlib.pyplot as plt x = np.linspace(0, 2*np.pi, 400) y = np.sin(x) plt.plot(x, y) plt.title('sin(x)') plt.xlabel('x'); plt.ylabel('sin x') plt.show()

In [3]:

import matplotlib.pyplot as plt

import numpy as np
x = np.random.normal(size=1000)
plt.hist(x, bins=30)
plt.title('N(0,1) 直方图')
plt.xlabel('样本值')
plt.ylabel('频次')
plt.show()

import matplotlib.pyplot as plt import numpy as np x = np.random.normal(size=1000) plt.hist(x, bins=30) plt.title('N(0,1) 直方图') plt.xlabel('样本值') plt.ylabel('频次') plt.show()