datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,1997,03 0:30:00,9 ,       0,0.084127,0.009347,0.028042
sgpcmbeC1.c1,1997,03 1:30:00,10 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,03 2:30:00,10 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,03 3:30:00,10 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,03 4:30:00,10 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,03 5:30:00,11 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,03 6:30:00,11 ,2.562948,14.94141,9.781337,3.884136
sgpcmbeC1.c1,1997,03 7:30:00,11 ,38.61645,84.67886,56.55613,15.11192
sgpcmbeC1.c1,1997,03 8:30:00,11 ,54.14515,194.5868,94.71156, 42.9163
sgpcmbeC1.c1,1997,03 9:30:00,10 ,62.55238, 302.873,134.0588,89.43156
sgpcmbeC1.c1,1997,0310:30:00,10 ,67.47369,479.4381,162.6341,134.1619
sgpcmbeC1.c1,1997,0311:30:00,10 ,69.12718,417.2758,177.7575,140.0755
sgpcmbeC1.c1,1997,0312:30:00,10 ,70.04694,454.8196,192.6066,150.5304
sgpcmbeC1.c1,1997,0313:30:00,10 , 70.7845,449.9059,173.5907,130.4574
sgpcmbeC1.c1,1997,0314:30:00,10 ,66.48814,398.1329,144.4444,102.3749
sgpcmbeC1.c1,1997,0315:30:00,11 ,63.93911,297.7111,136.9704,84.89203
sgpcmbeC1.c1,1997,0316:30:00,11 ,56.88216,201.4343,103.6618,51.19893
sgpcmbeC1.c1,1997,0317:30:00,10 ,41.90034, 132.759,71.80007,33.52685
sgpcmbeC1.c1,1997,0318:30:00,10 ,10.98869,29.21422,18.52096, 5.93071
sgpcmbeC1.c1,1997,0319:30:00,11 ,       0,0.651589,0.100698,0.228263
sgpcmbeC1.c1,1997,0320:30:00,11 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,0321:30:00,11 ,       0,0.429247,0.051033,0.131552
sgpcmbeC1.c1,1997,0322:30:00,11 ,       0,0.714466,0.067702,0.214699
sgpcmbeC1.c1,1997,0323:30:00,8 ,       0,       0,       0,       0