new_contents: import scipy.io
  import numpy as np
  
  # class CO2simulation(object):
  	# def __init__(self, resolution):
  		# """
  		# 	resolution: low(59x55), medium(117x109), large(217x234)
  		# """
  		# Load Vp1.mat, Vp2.mat, Vp3.mat into
  resolution = 'low'  
  if resolution is 'low':
      Vp_dict = scipy.io.loadmat('./data/Res1.mat')
  elif resolution is 'medium':
  	Vp_dict = scipy.io.loadmat('./data/Res2.mat')
  elif resolution is 'high':
  	Vp_dict = scipy.io.loadmat('./data/Res3.mat')
  else:
  	print 'select resolution among low, medium and high'
  
  x_true_array = Vp_dict['truemodel']
  x_loc_array = Vp_dict['xc']
  y_loc_array = Vp_dict['yc']
  H_mtx = Vp_dict['H']
  
  x_true = [] #np.array(41)
  for i in range(41):
  	x_true.append(x_true_array[i][0])
  
  print x_true[40].shape
  print type (x_true_array)
  print len(x_true)
  
subject: load information from res1.mat