text: import csv
  import matplotlib.pyplot as plt
  
  csvFile = open('/home/hemingshan/exo_ws/src/sensor_module/csv_File/3_5_km.csv','r')
  reader  = csv.reader(csvFile)
  
  i = 0
  x = []
  L_T_A_Feedbk = []
  L_C_A_Feedbk = []
  R_T_A_Feedbk = []
  R_C_A_Feedbk = []
  
  L_F_P = []
  L_M_P = []
  L_B_P = []
  
  R_F_P = []
  R_M_P = []
  R_B_P = []
  
  for item in reader:
      if reader.line_num == 1:
          continue
  
  
  
      L_T_A_Feedbk.append(round(float(item[0]),2))
      L_C_A_Feedbk.append(round(float(item[3])-float(item[0]),2))
      R_T_A_Feedbk.append(round(float(item[6]),2))
      R_C_A_Feedbk.append(round(float(item[9])-float(item[6]),2))
  
      L_F_P.append(round(float(item[12]),2))
      L_M_P.append(round(float(item[13]),2))
      L_B_P.append(round(float(item[14]),2))
  
      R_F_P.append(round(float(item[15]),2))
      R_M_P.append(round(float(item[16]),2))
      R_B_P.append(round(float(item[17]),2))
  
      x.append(i)
      i = i+1
      if i == 5000:
          break
  
  plt.plot(x,L_T_A_Feedbk,label="Left_Thigh_Angle_Feedbk")
  plt.plot(x,L_C_A_Feedbk,label="Left_Calf_Angle_Feedbk")
  plt.plot(x,R_T_A_Feedbk,label="Right_Thigh_Angle_Feedbk")
  plt.plot(x,R_C_A_Feedbk,label="Right_Calf_Angle_Feedbk")
  
  
  # plt.plot(x,L_F_P,label="L_F_P")
  # plt.plot(x,L_M_P,label="L_M_P")
  # plt.plot(x,L_B_P,label="L_B_P")
  # plt.plot(x,R_F_P,label="R_F_P")
  # plt.plot(x,R_M_P,label="R_M_P")
  # plt.plot(x,R_B_P,label="R_B_P")
  
  plt.legend()
  plt.show()