Matplotlib 条形图，带有不同颜色的条和显示值的条

Question

我想更改此代码中条形的颜色，所有条形都是相同颜色，我想在存储在 maxtweet,p,n 变量中的每个条形顶部显示不同的值。

x=[]
x.append(max_tweets)
x.append(p)
x.append(n)
label=('tweets','positivity','nagitivity')
label_pos=np.arange(len(label))
plt.bar(label_pos,x,align='center',color='k')
plt.xticks(label_pos,label)
plt.xlabel('People Behaviour and Emotions')
plt.title('Sentiment Analysis')
plt.show()

Answer 1

import matplotlib.pylab as plt
import numpy as np
max_tweets = 19
p = 20
n = 30

datas = [{'label':'tweets', 'color': 'r', 'height': max_tweets},
    {'label':'positivity', 'color': 'g', 'height': p},
    {'label':'nagitivity', 'color': 'b', 'height': n}]

i = 0
for data in datas:
    plt.bar(i, data['height'],align='center',color=data['color'])
    i += 1

labels = [data['label'] for data in datas]
pos = [i for i in range(len(datas)) ]
plt.xticks(pos, labels)
plt.xlabel('People Behaviour and Emotions')
plt.title('Sentiment Analysis')
plt.show()

输出：

Matplotlib 条形图，带有不同颜色的条和显示值的条

Matplotlib Bar chart with different color bars and bar showing values

python

data-visualization

matplotlib

bar-chart

python-2.7