datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,1998,08 0:30:00,30 ,       0,1.153327,0.038444,0.210568
sgpcmbeC1.c1,1998,08 1:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,08 2:30:00,30 ,       0,1.074838,0.035828,0.196238
sgpcmbeC1.c1,1998,08 3:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,08 4:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,08 5:30:00,30 ,       0,10.79449,3.774108,2.545369
sgpcmbeC1.c1,1998,08 6:30:00,30 ,10.48166,36.86328,19.57475,6.702202
sgpcmbeC1.c1,1998,08 7:30:00,30 ,5.105531,53.02428,19.30065,12.56464
sgpcmbeC1.c1,1998,08 8:30:00,30 ,2.926192,49.40992,17.68963,13.21414
sgpcmbeC1.c1,1998,08 9:30:00,30 ,2.191691,87.01997,19.23135,19.50099
sgpcmbeC1.c1,1998,0810:30:00,30 ,1.501404,97.39586,24.12193, 27.6981
sgpcmbeC1.c1,1998,0811:30:00,30 ,1.455793,112.7856,29.70461,26.61575
sgpcmbeC1.c1,1998,0812:30:00,30 ,1.437048,66.36761,31.12999,21.26571
sgpcmbeC1.c1,1998,0813:30:00,31 ,1.132361, 110.172,31.58779,25.80206
sgpcmbeC1.c1,1998,0814:30:00,31 ,1.219427,81.77548,32.75736,24.97884
sgpcmbeC1.c1,1998,0815:30:00,31 ,1.849385,129.1233,  36.863,34.40858
sgpcmbeC1.c1,1998,0816:30:00,31 ,2.193646,73.78165,21.83324,17.72776
sgpcmbeC1.c1,1998,0817:30:00,31 ,5.933289,61.67657,19.72543,12.07338
sgpcmbeC1.c1,1998,0818:30:00,31 ,3.903182, 33.1252,17.30262,5.986766
sgpcmbeC1.c1,1998,0819:30:00,31 ,       0,29.19226,6.050467,5.555161
sgpcmbeC1.c1,1998,0820:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,0821:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,0822:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,0823:30:00,30 ,       0,0.326649,0.010888,0.059638