如何使用 datetime.time 在 Python 中绘图 [英] How to use datetime.time to plot in Python

问题描述

我有 HH:MM:SS 格式的时间戳列表，并想使用 datetime.time 绘制某些值.似乎python不喜欢我这样做的方式.有人可以帮忙吗?

I have list of timestamps in the format of HH:MM:SS and want to plot against some values using datetime.time. Seems like python doesn't like the way I do it. Can someone please help ?

import datetime
import matplotlib.pyplot as plt

# random data
x = [datetime.time(12,10,10), datetime.time(12, 11, 10)]
y = [1,5]

# plot
plt.plot(x,y)
plt.show()

*TypeError: float() argument must be a string or a number*

推荐答案

它在 Python 3.5.3 和 Matplotlib 2.1.0 中仍然有效.

It is still valid issue in Python 3.5.3 and Matplotlib 2.1.0.

解决方法是使用 datetime.datetime 对象而不是 datetime.time 对象:

A workaround is to use datetime.datetime objects instead of datetime.time ones:

import datetime
import matplotlib.pyplot as plt

# random data
x = [datetime.time(12,10,10), datetime.time(12, 11, 10)]
x_dt = [datetime.datetime.combine(datetime.date.today(), t) for t in x]
y = [1,5]

# plot
plt.plot(x_dt, y)
plt.show()

按默认日期部分不应该是可见的.否则你总是可以使用 DateFormatter:

By deafult date part should not be visible. Otherwise you can always use DateFormatter:

import matplotlib.dates as mdates
ax.xaxis.set_major_formatter(mdates.DateFormatter('%H-%M-%S'))

这篇关于如何使用 datetime.time 在 Python 中绘图的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！