python matplotlib图例仅显示列表的第一个条目 [英] python matplotlib legend shows first entry of a list only

问题描述

我无法让所有图例出现在matplotlib中.

I could not get all the legends to appear in matplotlib.

我的标签"数组是:

lab = ['Google', 'MSFT', 'APPL', 'EXXON', 'WMRT']

我使用以下代码添加图例:

I use the below code to add the legend:

ax.legend(lab,loc="best")

我只看到右上角的Google".如何显示所有标签?

Am seeing only 'Google' in top right corner. How to show all labels?

完整代码:

import numpy as np
import matplotlib.pyplot as plt
from itertools import cycle, islice

menMeans = (8092, 812, 2221, 1000, 562)
N = len(menMeans)

lab = ['Google', 'MSFT', 'APPL', 'EXXON', 'WMRT']

ind = np.arange(N)  # the x locations for the groups
width = 0.35       # the width of the bars

fig, ax = plt.subplots()
my_colors = list(islice(cycle(['b', 'r', 'g', 'y', 'k']), None, N))
rects1 = ax.bar(ind, menMeans, width, color=my_colors,label=lab)

# add some
ax.set_ylabel('Count')
ax.set_title('Trending words and their counts')
ax.set_xticks(ind+width)
ax.legend(lab,loc="best")
plt.show()

推荐答案

@Ffisegydd的回答可能更有用 *，但不能回答问题.只需为图例创建单独的条形图，您将获得所需的结果:

The answer by @Ffisegydd may be more useful*, but it doesn't answer the question. Simply create separate bar charts for the legend, and you'll get the desired result:

for x,y,c,lb in zip(ind,menMeans,my_colors,lab):
    ax.bar(x, y, width, color=c,label=lb)

ax.legend()

* 要了解为什么此演示文稿可能有害，请考虑如果观看者是色盲(或以黑白打印)会发生什么情况.

* To see why this presentation may be harmful, consider what would happen if the viewer was colorblind (or this was printed in black and white).

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