python-3.x - Pandas & Matplotlib：个性化折线图中的日期格式

Question

我想让 x 轴上的日期看起来更漂亮，目前甚至无法读取日期。最好的方法是什么。下面是代码，也是实际的图形图片

import matplotlib.pyplot as plt
import pandas as pd
import pandas as pd

df = dataset
# gca stands for 'get current axis'
ax = plt.gca()
y1 = df['Predicted_Lower']
y2 = df['Predicted_Upper']
x = df['Date']
ax.fill_between(x,y1, y2, facecolor="#CC6666", alpha=0.7)
df.plot(kind='line',x='Date',y='Predicted_Lower',color='white',ax=ax)
df.plot(kind='line',x='Date',y='Predicted_Upper',color='white', ax=ax)
df.plot(kind='line',x='Date',y='Predicted', color='yellow', ax=ax)
df.plot(kind='line',x='Date',y='Actuals', color='green', ax=ax)
plt.xticks(rotation=45)

plt.show()

Answer 1

locs您可以通过设置和labels参数使用修改标签的数量，matplotlib.pyplot.xticks例如获取当前locs并且labels仅绘制其中的三分之一：

# ...
df.plot(kind='line',x='Date',y='Actuals', color='green', ax=ax)
locs, labels = plt.xticks()
plt.xticks(locs[::3], labels[::3], rotation=45)
plt.show()