datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,1998,02 0:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,02 1:30:00,24 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,02 2:30:00,24 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,02 3:30:00,24 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,02 4:30:00,24 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,02 5:30:00,24 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,02 6:30:00,24 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,02 7:30:00,23 ,       0,26.51494,5.785124,8.348976
sgpcmbeC1.c1,1998,02 8:30:00,22 ,0.031538,80.24482, 22.3937,28.45849
sgpcmbeC1.c1,1998,02 9:30:00,22 ,0.108362,148.4816,32.20231,  42.587
sgpcmbeC1.c1,1998,0210:30:00,22 ,0.188414,157.9076,41.17409,48.05586
sgpcmbeC1.c1,1998,0211:30:00,23 ,0.259729,173.1796,42.78891,57.22176
sgpcmbeC1.c1,1998,0212:30:00,23 ,0.132474,200.3625,50.80325,69.39127
sgpcmbeC1.c1,1998,0213:30:00,22 , 0.15474,157.1604,58.35217,57.15456
sgpcmbeC1.c1,1998,0214:30:00,22 ,0.175326,205.6414,71.67698,60.74629
sgpcmbeC1.c1,1998,0215:30:00,23 ,0.109654,191.9492,62.90237,57.39847
sgpcmbeC1.c1,1998,0216:30:00,23 ,0.000361,76.60737,32.16946,26.25264
sgpcmbeC1.c1,1998,0217:30:00,22 ,0.007052,48.70816,19.93694,20.29715
sgpcmbeC1.c1,1998,0218:30:00,23 ,       0,5.523046,0.707218,1.570703
sgpcmbeC1.c1,1998,0219:30:00,25 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,0220:30:00,25 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,0221:30:00,25 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,0222:30:00,25 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,0223:30:00,25 ,       0,       0,       0,       0