datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2005,03 0:30:00,31 ,       0,1.552853,0.298645,0.493167
sgpcmbeC1.c1,2005,03 1:30:00,31 ,       0,1.487231,0.281531,0.470289
sgpcmbeC1.c1,2005,03 2:30:00,31 ,       0,1.559688, 0.24906,0.529029
sgpcmbeC1.c1,2005,03 3:30:00,31 ,       0,1.495571, 0.18655,0.447039
sgpcmbeC1.c1,2005,03 4:30:00,31 ,       0,0.930199,0.083844,0.261259
sgpcmbeC1.c1,2005,03 5:30:00,31 ,       0,1.805754,0.212202,0.510438
sgpcmbeC1.c1,2005,03 6:30:00,31 , 1.58809,19.78254,6.055994,4.534066
sgpcmbeC1.c1,2005,03 7:30:00,31 ,2.813702,51.94323,17.32923,12.61359
sgpcmbeC1.c1,2005,03 8:30:00,30 ,3.211438,67.70105, 18.9349,16.91889
sgpcmbeC1.c1,2005,03 9:30:00,30 , 1.06878,81.85489,29.14584,26.51048
sgpcmbeC1.c1,2005,0310:30:00,30 ,1.493652,105.5005,34.40292,31.55081
sgpcmbeC1.c1,2005,0311:30:00,30 ,0.981974,106.1649,34.24912,29.58191
sgpcmbeC1.c1,2005,0312:30:00,30 ,1.039248, 115.728,42.46272,38.48173
sgpcmbeC1.c1,2005,0313:30:00,30 ,1.196752,132.5706,46.48064,39.56342
sgpcmbeC1.c1,2005,0314:30:00,31 , 1.13901,121.8553,38.30241,30.96164
sgpcmbeC1.c1,2005,0315:30:00,31 ,1.655128,109.8016, 36.1082,28.32385
sgpcmbeC1.c1,2005,0316:30:00,31 ,2.898773,92.69707,29.27645,24.42139
sgpcmbeC1.c1,2005,0317:30:00,31 ,5.368113,52.43025,18.17426,11.61279
sgpcmbeC1.c1,2005,0318:30:00,31 ,3.236509,38.72008,12.62134,6.985043
sgpcmbeC1.c1,2005,0319:30:00,31 ,       0,1.486508,0.456621,0.619368
sgpcmbeC1.c1,2005,0320:30:00,31 ,       0,1.649866,0.404452,0.564951
sgpcmbeC1.c1,2005,0321:30:00,31 ,       0,1.601441,0.374755,  0.5522
sgpcmbeC1.c1,2005,0322:30:00,31 ,       0,1.551456,0.291919,0.503157
sgpcmbeC1.c1,2005,0323:30:00,31 ,       0,1.472042,0.372152,0.534098