datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2004,02 0:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,02 1:30:00,25 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,02 2:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,02 3:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,02 4:30:00,25 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,02 5:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,02 6:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,02 7:30:00,29 ,       0,22.18505,10.64073, 6.12034
sgpcmbeC1.c1,2004,02 8:30:00,29 ,8.656211,110.4685,58.56578,24.90323
sgpcmbeC1.c1,2004,02 9:30:00,29 ,16.11098,231.6036,111.2709,53.07037
sgpcmbeC1.c1,2004,0210:30:00,29 ,46.82893,364.8023,155.4106,83.79076
sgpcmbeC1.c1,2004,0211:30:00,29 ,58.13789,485.9623,183.1695,109.9385
sgpcmbeC1.c1,2004,0212:30:00,29 ,59.58654,442.8922,196.0373,113.4027
sgpcmbeC1.c1,2004,0213:30:00,29 ,46.65536,422.2254,187.8517,110.4885
sgpcmbeC1.c1,2004,0214:30:00,29 ,24.69442,375.9038, 177.744,96.05627
sgpcmbeC1.c1,2004,0215:30:00,29 ,15.64165,  285.12,146.7991,77.27964
sgpcmbeC1.c1,2004,0216:30:00,29 ,1.669782, 178.548,96.25593,45.62692
sgpcmbeC1.c1,2004,0217:30:00,29 ,       0,71.58006,34.32242,16.24216
sgpcmbeC1.c1,2004,0218:30:00,29 ,       0,4.813025,0.852159,1.225329
sgpcmbeC1.c1,2004,0219:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,0220:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,0221:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,0222:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,0223:30:00,27 ,       0,       0,       0,       0