本目承接該系列上一目，總結更多的我用到的的畫圖技巧。

柱狀圖(橫向)

import matplotlib.pyplot as plt
from matplotlib import cm
import numpy as np

label = ['a', 'b', 'c', 'd', 'e', 'f']
x = sorted([1234, 221, 765, 124, 2312, 890])

idx = np.arange(len(x))
color = cm.jet(np.array(x) / max(x))
plt.barh(idx, x, color=color)
plt.yticks(idx + 0.4
 
, label)
plt.grid(axis='x')

plt.xlabel('Revenues Earned')
plt.ylabel('Salespeople')
plt.title('Top 12 Salespeople(2012)\n(in USD)')

plt.show()