datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,1998,08 0:30:00,30 ,       0, 0.00438,0.000146,  0.0008
sgpcmbeC1.c1,1998,08 1:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,08 2:30:00,30 ,       0,0.038838,0.001295,0.007091
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 ,       0,1.042816,0.072227,0.198101
sgpcmbeC1.c1,1998,08 6:30:00,30 ,0.195694,60.11425, 24.9223,13.80829
sgpcmbeC1.c1,1998,08 7:30:00,30 ,6.461945, 204.428,128.0302,55.47009
sgpcmbeC1.c1,1998,08 8:30:00,30 ,3.299255,379.8046,246.7012,106.5704
sgpcmbeC1.c1,1998,08 9:30:00,30 ,1.096924,548.6329,375.7096,155.7965
sgpcmbeC1.c1,1998,0810:30:00,30 ,3.457428, 682.021,500.1084,190.4645
sgpcmbeC1.c1,1998,0811:30:00,30 ,0.313431,  764.92, 533.519, 229.545
sgpcmbeC1.c1,1998,0812:30:00,30 ,3.915863,798.8282,484.4429,264.0805
sgpcmbeC1.c1,1998,0813:30:00,31 ,18.30646,763.8539,  509.98, 206.972
sgpcmbeC1.c1,1998,0814:30:00,31 , 3.49025, 682.462,422.9928, 203.838
sgpcmbeC1.c1,1998,0815:30:00,31 ,0.270311,559.2311,349.4185,184.7914
sgpcmbeC1.c1,1998,0816:30:00,31 ,       0,414.8814,235.1413,135.8793
sgpcmbeC1.c1,1998,0817:30:00,31 ,0.036323,219.3453,103.7588, 76.8873
sgpcmbeC1.c1,1998,0818:30:00,31 ,0.026546,71.76019,26.37155,18.70291
sgpcmbeC1.c1,1998,0819:30:00,31 ,       0,5.118173,0.533817,1.039259
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 ,       0,0.031389,0.001046,0.005731