python绘制浅色范围曲线的示例代码

import re
import seaborn as sns
import matplotlib.pyplot as plt
import matplotlib.cm as cm
import shutil
import os
import math
sns.set_style('whitegrid')
 
path=r"F:\pycharm\class\20211008\alexnet_7class_srcData.csv"#数据的路径
#读取csv文件
csvfile = open(path, 'r')
plots = csv.reader(csvfile)
r1=[]
r2=[]
r3=[]
#将每一列数据表示一组，将数据分组存放
#row是按行读取，每一行有三个数据，分别存放
for row in plots:
 r1.append(round(float(row[0]),3))
 r2.append(round(float(row[1]),3))
 r3.append(round(float(row[2]),3))
 
#求均值
avg=[]
for i in range(len(r1)):
 avg.append(round((r1[i]+r2[i]+r3[i])/3,3))
 
#求方差
var=[]
for i in range(len(r1)):
 var.append(((r1[i]-avg[i])**2+(r2[i]-avg[i])**2+(r3[i]-avg[i])**2)/3)
 
#求标准差
std=[]
for i in range(len(r1)):
 std.append(math.sqrt(var[i]))

#通过该公式算出平均值+-标准差的曲线，便于后面范围曲线的描绘
r1 = list(map(lambda x: x[0]-x[1], zip(avg, std)))
r2 = list(map(lambda x: x[0]+x[1], zip(avg, std)))
plt.rcParams["figure.figsize"] = (15,10)
plt.plot(r1)
plt.plot(r2)
plt.legend(['范围曲线'],fontsize=30)
plt.xticks(fontsize=20)
plt.yticks(fontsize=20)
plt.xlabel('Epoch Number',fontsize=20)
plt.ylabel('Accuracy',fontsize=20)
plt.ylim(0, 20)
plt.show()

#横坐标由于fill_between函数
x=[]
for i in range(300):
  x.append(i+1)
 
# import matplotlib.pyplot as plt
plt.rcParams["figure.figsize"] = (15,10)
plt.plot(avg)
plt.fill_between(x,r1, r2, color=cm.viridis(0.5), alpha=0.2)
plt.legend(['avg'],fontsize=30)
plt.xticks(fontsize=20)
plt.yticks(fontsize=20)
plt.xlabel('Epoch Number',fontsize=20)
plt.ylabel('Accuracy',fontsize=20)
plt.ylim(0, 20)
plt.show()