问题描述
我试图用pyplot在x轴上的datetime对象列表上绘制一些数据.但是，日期显示为标准格式，即%Y-%m-%d %H:%M:%S(太长).我可以通过使用strftime创建日期字符串列表来规避此问题，而改用它.我也知道，对于pyplot，存在某种date对象固有的对象，我可以使用它代替datetime.
I am trying to plot some data against a list of datetime objects in the x axis with pyplot. However the dates appear as the standard format, which is %Y-%m-%d %H:%M:%S (way too long). I can circumvent this by creating a list of date strings with strftime and use that instead. I also know that there is some kind of date object intrinsic for pyplot which I could use instead of datetime.
有没有办法告诉pyplot以哪种格式绘制datetime对象?不必将所有内容都转换为字符串或其他类型的对象?
Is there a way to tell pyplot in which format to plot the datetimeobjects however? Without having to transform everything to string or another kind of object?
谢谢.
推荐答案
您可以使用DateFormatter:
fig = plt.figure()
ax = fig.add_subplot(111)
ax.plot(your_dates, your_data)
# format your data to desired format. Here I chose YYYY-MM-DD but you can set it to whatever you want.
import matplotlib.dates as mdates
ax.xaxis.set_major_formatter(mdates.DateFormatter('%Y-%m-%d'))
# rotate and align the tick labels so they look better
fig.autofmt_xdate()
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