datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2004,02 0:30:00,29 ,0.218303,3.825826,   1.564,0.827599
sgpcmbeC1.c1,2004,02 1:30:00,29 ,0.236892,4.121377,1.697526,1.014698
sgpcmbeC1.c1,2004,02 2:30:00,29 ,0.324874,4.878486,1.737349,1.244718
sgpcmbeC1.c1,2004,02 3:30:00,29 ,0.255588,4.366088,1.610896,1.013001
sgpcmbeC1.c1,2004,02 4:30:00,29 ,0.221199,6.331215,1.767975,1.185945
sgpcmbeC1.c1,2004,02 5:30:00,29 ,0.293071,3.810193, 1.56269,  0.8513
sgpcmbeC1.c1,2004,02 6:30:00,29 ,0.224071,5.829137,1.824072, 1.27971
sgpcmbeC1.c1,2004,02 7:30:00,29 ,0.294851,7.170362,2.533218,1.913528
sgpcmbeC1.c1,2004,02 8:30:00,29 ,0.499858,9.002404,4.015149,2.371233
sgpcmbeC1.c1,2004,02 9:30:00,29 ,0.700174, 12.6912,4.749254,2.766976
sgpcmbeC1.c1,2004,0210:30:00,29 ,1.324214,12.84408,4.982608,2.787181
sgpcmbeC1.c1,2004,0211:30:00,29 ,0.612771,10.13032,   4.049,2.228607
sgpcmbeC1.c1,2004,0212:30:00,29 , 1.09923,11.44208,3.725831, 2.50851
sgpcmbeC1.c1,2004,0213:30:00,29 ,0.953523,10.31905,3.177322,2.115973
sgpcmbeC1.c1,2004,0214:30:00,29 ,0.576951,9.428808,3.323767,2.130076
sgpcmbeC1.c1,2004,0215:30:00,29 ,0.807624,7.458832,3.646776, 1.90812
sgpcmbeC1.c1,2004,0216:30:00,29 ,0.884265,6.707086,3.744522,1.759542
sgpcmbeC1.c1,2004,0217:30:00,29 ,0.861044,12.51427,5.161119,3.513534
sgpcmbeC1.c1,2004,0218:30:00,29 ,0.419351,9.039789, 2.61509, 2.10126
sgpcmbeC1.c1,2004,0219:30:00,29 , 0.37899,7.481657,2.421659,1.769164
sgpcmbeC1.c1,2004,0220:30:00,29 ,0.460222,6.637971,2.059903,1.408887
sgpcmbeC1.c1,2004,0221:30:00,29 ,0.471737,6.116293,2.166089,1.364757
sgpcmbeC1.c1,2004,0222:30:00,29 ,0.535502,5.327091,1.823808,1.209367
sgpcmbeC1.c1,2004,0223:30:00,29 ,0.331675,4.273416,1.662243, 0.95206