带日期的 matplotlib 条形图 [英] matplotlib bar chart with dates

问题描述

我知道 plot_date() 但有没有 bar_date() ?

I know about plot_date() but is there a bar_date() out there?

一般的方法是使用 set_xticks 和 set_xticklabels，但我想要一些可以处理从几个小时到几年的时间尺度的东西(这个意味着涉及主要和次要刻度以使我认为可读).

The general method would be to use set_xticks and set_xticklabels, but I'd like something that can handle time scales from a few hours out to a few years (this means involving the major and minor ticks to make things readable I think).

我意识到我正在绘制与特定时间间隔(条形跨度)相关的值.我在下面更新了我使用的基本解决方案:

I realized that I am plotting values associated with a specific time interval (that the bar spans). I updated below with the basic solution I used:

import matplotlib.pyplot as plt  
import datetime  
t=[datetime.datetime(2010, 12, 2, 22, 0),datetime.datetime(2010, 12, 2, 23, 0),         datetime.datetime(2010, 12, 10, 0, 0),datetime.datetime(2010, 12, 10, 6, 0)]  
y=[4,6,9,3]  
interval=1.0/24.0  #1hr intervals, but maplotlib dates have base of 1 day  
ax = plt.subplot(111)  
ax.bar(t, y, width=interval)  
ax.xaxis_date()   
plt.show()

推荐答案

所有 plot_date 是绘制函数和调用 ax.xaxis_date().

您需要做的就是:

import numpy as np
import matplotlib.pyplot as plt
import datetime

x = [datetime.datetime(2010, 12, 1, 10, 0),
    datetime.datetime(2011, 1, 4, 9, 0),
    datetime.datetime(2011, 5, 5, 9, 0)]
y = [4, 9, 2]

ax = plt.subplot(111)
ax.bar(x, y, width=10)
ax.xaxis_date()

plt.show()

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