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notes_estom/Python/matplotlab/gallery/frontpage/histogram.md
2020-09-26 22:03:11 +08:00

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# Frontpage 直方图示例
此示例再现Frontpage 直方图示例。
![Frontpage 直方图示例](https://matplotlib.org/_images/sphx_glr_histogram_001.png)
```python
import matplotlib.pyplot as plt
import numpy as np
random_state = np.random.RandomState(19680801)
X = random_state.randn(10000)
fig, ax = plt.subplots()
ax.hist(X, bins=25, density=True)
x = np.linspace(-5, 5, 1000)
ax.plot(x, 1 / np.sqrt(2*np.pi) * np.exp(-(x**2)/2), linewidth=4)
ax.set_xticks([])
ax.set_yticks([])
fig.savefig("histogram_frontpage.png", dpi=25) # results in 160x120 px image
```
## 下载这个示例
- [下载python源码: histogram.py](https://matplotlib.org/_downloads/histogram.py)
- [下载Jupyter notebook: histogram.ipynb](https://matplotlib.org/_downloads/histogram.ipynb)