docs: def _profiles_index(self):
          """
          read profiles.index and make hash array
  
          Notes
          -----
          sets the attributes.
  
          log_ind : hash array that returns profile.data or log.data
          file number from model number.
  
          model : the models for which profile.data or log.data is
          available
  
          """
  
          prof_ind_name = self.prof_ind_name
  
          f = open(self.sldir+'/'+prof_ind_name,'r')
          line = f.readline()
          numlines=int(line.split()[0])
          print(str(numlines)+' in profiles.index file ...')
  
          model=[]
          log_file_num=[]
          for line in f:
              model.append(int(line.split()[0]))
              log_file_num.append(int(line.split()[2]))
  
          log_ind={}    # profile.data number from model
          for a,b in zip(model,log_file_num):
              log_ind[a] = b
  
          self.log_ind=log_ind
          self.model=model