docs: def set_cores_massive(self,filename='core_masses_massive.txt'):
  
  		'''
  			Uesse function cores in nugridse.py
  		'''
  		
  		core_info=[]
  		minis=[]
                  for i in range(len(self.runs_H5_surf)):
                          sefiles=se(self.runs_H5_out[i])
  			mini=sefiles.get('mini')
  			minis.append(mini)
  			incycle=int(sefiles.se.cycles[-1])
  			core_info.append(sefiles.cores(incycle=incycle))
  		print_info=''
                  for i in range(len(self.runs_H5_surf)):
  			if i ==0:
  				print 'Following returned for each initial mass'
  				print core_info[i][1]
                          #print '----Mini: ',minis[i],'------'
  			print_info+=(str(minis[i])+' & ')
  			info=core_info[i][0]
  			for k in range(len(info)):
  				print_info+=('{:.3E}'.format(float(core_info[i][0][k]))+' & ')
  			print_info=(print_info+'\n')
  			#print core_info[i][2]
  		f1=open(filename,'a')
  		f1.write(print_info)
  		f1.close()