text: import numpy as np
  import csv
  import math
  Ng=5976
  
  def transfer(arr,N):
      print(N)
  
      Nm = 8
      narr=[]
      for i in range(Nm):
          narr.append(math.log(arr[i],10))
  
     # narr = []
     # narr.append(math.log(arr[0],10))
      return narr
  def readData(filename):
      array=open(filename).readlines()
      matrix=[]
      for line in array:
          line=line.strip('\r\n').split(',')
          line=[float(x) for x in line]
          matrix.append(line)
      matrix=np.array(matrix)
      return matrix
  #with open("dN_Eco_3.csv","wb") as fc:
  with open("log10E_256_27_1000.csv", "wb") as fc:
      csvWriter=csv.writer(fc)
      e=readData('./E_256_27_1000.csv')
      NodeNum =347
      for i in range(Ng):
          e[i]=transfer(e[i],NodeNum)
          csvWriter.writerow(e[i])
      fc.close
  