datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2004,02 0:30:00,26 ,       0, 1.75057,0.096437,0.368533
sgpcmbeC1.c1,2004,02 1:30:00,25 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,02 2:30:00,26 ,       0,0.152566,0.005868,0.029921
sgpcmbeC1.c1,2004,02 3:30:00,27 ,       0,0.154116,0.005708, 0.02966
sgpcmbeC1.c1,2004,02 4:30:00,25 ,       0,0.461222,0.018449,0.092244
sgpcmbeC1.c1,2004,02 5:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,02 6:30:00,29 ,       0,0.309862,0.010685, 0.05754
sgpcmbeC1.c1,2004,02 7:30:00,29 ,       0,30.13811, 5.74944,8.398463
sgpcmbeC1.c1,2004,02 8:30:00,29 , 0.00022,179.3167,64.61218,64.61034
sgpcmbeC1.c1,2004,02 9:30:00,29 ,0.002287,362.9751,142.8496,142.4709
sgpcmbeC1.c1,2004,0210:30:00,29 ,       0,528.1199,242.4054,207.8745
sgpcmbeC1.c1,2004,0211:30:00,29 ,       0,637.5283,299.5837,252.9089
sgpcmbeC1.c1,2004,0212:30:00,29 ,0.012711,698.1676,337.3487,262.6562
sgpcmbeC1.c1,2004,0213:30:00,29 ,       0, 667.658,369.6928,242.3761
sgpcmbeC1.c1,2004,0214:30:00,29 ,0.041412,592.6219,288.5151,211.9435
sgpcmbeC1.c1,2004,0215:30:00,29 ,0.179306,454.8268, 207.399,168.2085
sgpcmbeC1.c1,2004,0216:30:00,29 ,       0,268.5151,117.6104,101.4067
sgpcmbeC1.c1,2004,0217:30:00,29 ,       0,91.84391, 31.0862,  30.244
sgpcmbeC1.c1,2004,0218:30:00,29 ,       0,3.387751,0.408417,0.740037
sgpcmbeC1.c1,2004,0219:30:00,29 ,       0,0.770161,0.041631,0.161906
sgpcmbeC1.c1,2004,0220:30:00,29 ,       0,1.042011,0.035931,0.193497
sgpcmbeC1.c1,2004,0221:30:00,28 ,       0,0.515687,0.018417,0.097456
sgpcmbeC1.c1,2004,0222:30:00,27 ,       0,1.199065,0.087546,0.271502
sgpcmbeC1.c1,2004,0223:30:00,27 ,       0,0.427527,0.029055,0.095146