datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,1999,03 0:30:00,29 ,       0,0.782509,0.026983,0.145308
sgpcmbeC1.c1,1999,03 1:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,03 2:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,03 3:30:00,30 ,       0,0.794367,0.026479,0.145031
sgpcmbeC1.c1,1999,03 4:30:00,29 ,       0,0.422875,0.014582,0.078526
sgpcmbeC1.c1,1999,03 5:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,03 6:30:00,29 ,       0,21.47454,6.370708,6.827573
sgpcmbeC1.c1,1999,03 7:30:00,29 ,1.858674,72.38618,36.14968,21.39791
sgpcmbeC1.c1,1999,03 8:30:00,29 ,2.017473, 112.354,49.53725,25.35569
sgpcmbeC1.c1,1999,03 9:30:00,29 ,2.498308,153.6668,66.10414,32.57198
sgpcmbeC1.c1,1999,0310:30:00,29 ,3.154612, 190.394,72.17344, 49.1489
sgpcmbeC1.c1,1999,0311:30:00,29 ,5.828955,237.0437,70.76206,69.65416
sgpcmbeC1.c1,1999,0312:30:00,30 ,3.041055,161.1316,66.20761,56.05758
sgpcmbeC1.c1,1999,0313:30:00,30 ,9.431447,236.8533,77.15769,65.47888
sgpcmbeC1.c1,1999,0314:30:00,30 , 16.0772,230.7052,73.12003,67.21815
sgpcmbeC1.c1,1999,0315:30:00,30 ,14.88497,179.0514,65.91811,41.61274
sgpcmbeC1.c1,1999,0316:30:00,30 ,4.854278,131.4618, 52.5079,29.15585
sgpcmbeC1.c1,1999,0317:30:00,30 ,3.770928,89.91507,40.58524,24.52642
sgpcmbeC1.c1,1999,0318:30:00,30 ,1.306544,33.10152,14.20663,9.876916
sgpcmbeC1.c1,1999,0319:30:00,29 ,       0,0.924797,0.057239,0.215529
sgpcmbeC1.c1,1999,0320:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,0321:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,0322:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,0323:30:00,29 ,       0,       0,       0,       0