如何在matplotlib中的x轴上显示日期和时间 [英] How to show date and time on x axis in matplotlib

问题描述

我想为matplotlib中的x轴分配随着时间变化的完整日期，但是使用自动缩放，我只能获取时间或日期，而不能同时获取两者.以下代码:

I would like to assign for x axis in matplotlib plot full date with time but with autoscale I could get only times or dates but not both. Following code:

import matplotlib.pyplot as plt
import pandas as pd

times = pd.date_range('2015-10-06', periods=500, freq='10min')

fig, ax = plt.subplots(1)
fig.autofmt_xdate()
plt.plot(times, range(times.size))
plt.show()

在x轴上，我只得到没有任何日期的时间，因此很难区分测量结果.

And on x axis I get only times without any dates so it's hard to distinct measurements.

我认为这是matplotlib.dates.AutoDateFormatter中matplotlib的某些选项，但我找不到任何可以让我更改自动缩放比例的选项.

I think that it's some option in matplotlib in matplotlib.dates.AutoDateFormatter but I couldn't find any one that could allow me to change that autoscale.

推荐答案

您可以使用 matplotlib.dates.DateFormatter ，它以 strftime 格式字符串作为参数.要获取day-month-year hour:minute格式，可以使用%d-%m-%y %H:%M:

You can do this with a matplotlib.dates.DateFormatter, which takes a strftime format string as its argument. To get a day-month-year hour:minute format, you can use %d-%m-%y %H:%M:

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

times = pd.date_range('2015-10-06', periods=500, freq='10min')

fig, ax = plt.subplots(1)
fig.autofmt_xdate()
plt.plot(times, range(times.size))

xfmt = mdates.DateFormatter('%d-%m-%y %H:%M')
ax.xaxis.set_major_formatter(xfmt)

plt.show()

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