datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,1998,01 0:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,01 1:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,01 2:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,01 3:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,01 4:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,01 5:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,01 6:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,01 7:30:00,29 ,       0,13.84744,5.034403,4.029226
sgpcmbeC1.c1,1998,01 8:30:00,29 ,3.396363,81.09908,29.06163,20.68792
sgpcmbeC1.c1,1998,01 9:30:00,29 ,3.180077,74.44421,33.96476,  22.232
sgpcmbeC1.c1,1998,0110:30:00,29 ,5.169658,107.8993,37.26111,23.68926
sgpcmbeC1.c1,1998,0111:30:00,29 , 9.16692,150.1257,37.64923,32.92979
sgpcmbeC1.c1,1998,0112:30:00,29 ,4.495413,146.9646,33.93645,32.02503
sgpcmbeC1.c1,1998,0113:30:00,29 ,7.352444,151.0172,40.16421,37.97446
sgpcmbeC1.c1,1998,0114:30:00,29 ,8.000798,104.5653,41.46777, 25.5723
sgpcmbeC1.c1,1998,0115:30:00,29 ,5.518673,110.0076,39.27224,26.47414
sgpcmbeC1.c1,1998,0116:30:00,29 ,3.324415,74.45638,33.52178,21.03722
sgpcmbeC1.c1,1998,0117:30:00,29 ,1.620322,39.17639,16.64045,12.84374
sgpcmbeC1.c1,1998,0118:30:00,28 ,       0,1.174113,0.041933,0.221887
sgpcmbeC1.c1,1998,0119:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,0120:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,0121:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,0122:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,0123:30:00,27 ,       0,       0,       0,       0