matplotlib & pandas

Python/matplotlab/gallery/misc/load_converter.md

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+# 负载转换器
+
+![负载转换器示例](https://matplotlib.org/_images/sphx_glr_load_converter_001.png)
+
+输出：
+
+```python
+loading /home/tcaswell/mc3/envs/dd37/lib/python3.7/site-packages/matplotlib/mpl-data/sample_data/msft.csv
+```
+
+```python
+import numpy as np
+import matplotlib.pyplot as plt
+import matplotlib.cbook as cbook
+from matplotlib.dates import bytespdate2num
+
+datafile = cbook.get_sample_data('msft.csv', asfileobj=False)
+print('loading', datafile)
+
+dates, closes = np.loadtxt(datafile, delimiter=',',
+                           converters={0: bytespdate2num('%d-%b-%y')},
+                           skiprows=1, usecols=(0, 2), unpack=True)
+
+fig, ax = plt.subplots()
+ax.plot_date(dates, closes, '-')
+fig.autofmt_xdate()
+plt.show()
+```
+
+## 下载这个示例
+            
+- [下载python源码: load_converter.py](https://matplotlib.org/_downloads/load_converter.py)
+- [下载Jupyter notebook: load_converter.ipynb](https://matplotlib.org/_downloads/load_converter.ipynb)