text: import matplotlib.pyplot as plt 
  import pandas as pd 
  import numpy as np 
  
  plt.rcParams['text.usetex'] = True
  plt.rcParams['font.family'] = 'Computer Modern'
  
  ista 	= pd.read_csv('output/ISTA.csv')
  fista 	= pd.read_csv('output/FISTA.csv')
  
  k = ista['step'].values 
  
  plt.plot(k, ista['objective'].values, label='ISTA', color='red')
  plt.plot(k, fista['objective'].values, label='FISTA', color='blue')
  
  plt.xlabel('t')
  
  plt.legend()
  plt.savefig('output/convergence.png',bbox_inches='tight',pad_inches=0,
  	dpi=100,figsize=(1,1))