如何创建在一定范围内开始和结束的条形图 [英] How do I create a bar chart that starts and ends in a certain range

问题描述

我创建了一个计算机模型(只是为了好玩)来预测足球比赛的结果.我运行了一个计算机模拟来预测一个团队将获得多少分.我得到了每个团队的模拟结果列表.

我想绘制类似置信区间的图形，但要使用条形图.

我考虑了以下选项:

• 我考虑过使用matplotlib的烛台，但这不是外汇价格.
• 我也考虑过使用matplotlib的错误栏，特别是因为事实证明我可以将图形栏+错误栏混搭，但这并不是我真正想要的.实际上，我的目标是Nate Silver的538次选举预测结果.

Nate Silver 的太复杂了，他对分布进行了着色并改变了百分比的大小.我只想要一个在特定范围内绘制的简单条形图.

我不想诉诸于如

I created a computer model (just for fun) to predict soccer match result. I ran a computer simulation to predict how many points that a team will gain. I get a list of simulation result for each team.

I want to plot something like confidence interval, but using bar chart.

I considered the following option:

• I considered using matplotlib's candlestick, but this is not Forex price.
• I also considered using matplotlib's errorbar, especially since it turns out I can mashes graphbar + errorbar, but it's not really what I am aiming for. I am actually aiming for something like Nate Silver's 538 election prediction result.

Nate Silver's is too complex, he colored the distribution and vary the size of the percentage. I just want a simple bar chart that plots on a certain range.

I don't want to resort to plot bar stacking like shown here

解决方案

Matplotlib's barh (or bar) is probably suitable for this:

import numpy as np
import matplotlib.pylab as pl

x_mean = np.array([1,   3, 6  ])
x_std  = np.array([0.3, 1, 0.7])
y      = np.array([0,   1,  2 ])

pl.figure()
pl.barh(y, width=2*x_std, left=x_mean-x_std)

The bars have a horizontal width of 2*x_std and start at x_mean-x_std, so the center denotes the mean value.

It's not very pretty (yet), but highly customizable:

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