reference other engineer's code to explain wheather linux terminal can display matplotlib' figure

柱状图（plt.bar）

import numpy as np
from matplotlib import pyplot as plt
plt.figure(figsize=(9,6))
n = 8
X = np.arange(n)+1
#X是1,2,3,4,5,6,7,8,柱的个数
# numpy.random.uniform(low=0.0, high=1.0, size=None), normal
#uniform均匀分布的随机数，normal是正态分布的随机数，0.5-1均匀分布的数，一共有n个
Y1 = np.random.uniform(0.5,1.0,n)
Y2 = np.random.uniform(0.5,1.0,n)
plt.bar(X,Y1,width = 0.35,facecolor = 'lightskyblue',edgecolor = 'white')
#width:柱的宽度
plt.bar(X+0.35,Y2,width = 0.35,facecolor = 'yellowgreen',edgecolor = 'white')
#水平柱状图plt.barh，属性中宽度width变成了高度height
#打两组数据时用+
#facecolor柱状图里填充的颜色
#edgecolor是边框的颜色
#想把一组数据打到下边，在数据前使用负号
#plt.bar(X, -Y2, width=width, facecolor='#ff9999', edgecolor='white')
#给图加text
for x,y in zip(X,Y1):
plt.text(x+0.3, y+0.05, '%.2f' % y, ha='center', va= 'bottom')

for x,y in zip(X,Y2):
plt.text(x+0.6, y+0.05, '%.2f' % y, ha='center', va= 'bottom')
plt.ylim(0,+1.25)
plt.show()