datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2002,02 0:30:00,11 ,       0,0.457169,0.041561,0.137842
sgpcmbeC1.c1,2002,02 1:30:00,12 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,02 2:30:00,12 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,02 3:30:00,11 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,02 4:30:00,13 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,02 5:30:00,16 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,02 6:30:00,18 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,02 7:30:00,18 ,0.007722,39.60117,14.33695,13.58853
sgpcmbeC1.c1,2002,02 8:30:00,17 ,0.113718,91.35184,43.66274,26.69621
sgpcmbeC1.c1,2002,02 9:30:00,18 ,0.221958,151.0149,52.22428,38.46924
sgpcmbeC1.c1,2002,0210:30:00,18 ,0.864623,176.2993,71.51351,45.86752
sgpcmbeC1.c1,2002,0211:30:00,18 ,22.32173,177.3713,74.35306, 55.0399
sgpcmbeC1.c1,2002,0212:30:00,18 ,1.909007,173.3778,63.35213,63.54336
sgpcmbeC1.c1,2002,0213:30:00,18 ,13.96288,231.8557,57.21831,56.64105
sgpcmbeC1.c1,2002,0214:30:00,18 , 19.4304,190.5331,61.75994,47.65677
sgpcmbeC1.c1,2002,0215:30:00,18 ,4.975133,179.4537, 76.4728,41.45962
sgpcmbeC1.c1,2002,0216:30:00,18 ,       0,86.57774,52.30388,23.94933
sgpcmbeC1.c1,2002,0217:30:00,19 ,       0,53.45521, 31.0368,18.57803
sgpcmbeC1.c1,2002,0218:30:00,19 ,       0,5.027452,1.575436,1.259943
sgpcmbeC1.c1,2002,0219:30:00,19 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0220:30:00,19 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0221:30:00,17 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0222:30:00,16 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0223:30:00,16 ,       0,0.457624,0.028601,0.114406