datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2003,02 0:30:00,26 ,       0,0.955781,0.050101, 0.19683
sgpcmbeC1.c1,2003,02 1:30:00,20 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,02 2:30:00,20 ,       0,1.386488,0.069324,0.310028
sgpcmbeC1.c1,2003,02 3:30:00,20 ,       0,0.271731,0.013587,0.060761
sgpcmbeC1.c1,2003,02 4:30:00,22 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,02 5:30:00,24 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,02 6:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,02 7:30:00,28 ,1.733803,39.50428,15.94482,11.49979
sgpcmbeC1.c1,2003,02 8:30:00,28 ,15.31806,197.9049,114.2821, 59.8934
sgpcmbeC1.c1,2003,02 9:30:00,28 ,35.76416,384.1343,243.6114,112.3144
sgpcmbeC1.c1,2003,0210:30:00,28 ,39.68983,565.8287,378.9243,172.4991
sgpcmbeC1.c1,2003,0211:30:00,28 ,50.21964,687.5743,449.6721,209.3699
sgpcmbeC1.c1,2003,0212:30:00,28 ,70.94031,746.3728,485.1399,222.5305
sgpcmbeC1.c1,2003,0213:30:00,28 ,54.02801,701.5514,477.0627,223.8999
sgpcmbeC1.c1,2003,0214:30:00,28 ,60.68663,616.6467,398.4923,179.0959
sgpcmbeC1.c1,2003,0215:30:00,28 ,43.72786,473.3131,304.9191,142.0872
sgpcmbeC1.c1,2003,0216:30:00,28 ,20.47191,337.9065,186.1516,100.7295
sgpcmbeC1.c1,2003,0217:30:00,28 ,5.230575,140.1848,58.71279,36.45349
sgpcmbeC1.c1,2003,0218:30:00,28 ,       0, 5.00867,1.633887,1.698043
sgpcmbeC1.c1,2003,0219:30:00,28 ,       0, 1.59207, 0.09436,0.335616
sgpcmbeC1.c1,2003,0220:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,0221:30:00,23 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,0222:30:00,21 ,       0,0.249039,0.011859,0.054345
sgpcmbeC1.c1,2003,0223:30:00,22 ,       0,       0,       0,       0