Нарисовать график

import numpy as np 
import pandas as pd 
import matplotlib.pyplot as plt
df = pd.read_excel('okof.xlsx', index_col='DATE', parse_dates=True) 
df = df.sort_index() 
row = df.TIME.count()
mediana_iglx = df.IGLX.median() 
mediana_igly = df.IGLY.median() 
mediana_iglz = df.IGLZ.median() 
df['IGLX'] = df['IGLX'].apply(lambda x: x - mediana_iglx) 
df['IGLY'] = df['IGLY'].apply(lambda x: x - mediana_igly) 
df['IGLZ'] = df['IGLZ'].apply(lambda x: x - mediana_iglz) 
p=df.TIME
x=df.IGLX
y=df.IGLY
z=df.IGLZ
plt.plot(p,x, color='red', linestyle='-', label='IGLX')   
plt.plot(p,y, color='blue', linestyle='-', label='IGLY')  
plt.plot(p,z, color='red', linestyle='--', label='IGLZ')
plt.legend(loc='best') 
plt.xlabel('x', fontsize=14)
plt.ylabel('y', fontsize=14)
plt.ylim(-0.1, 0.3)
plt.title('График функций', fontsize=16, y=1.05)
plt.show()