datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2001,12 0:30:00,18 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,12 1:30:00,17 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,12 2:30:00,19 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,12 3:30:00,22 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,12 4:30:00,23 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,12 5:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,12 6:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,12 7:30:00,31 ,       0, 9.76423,4.296103,2.509485
sgpcmbeC1.c1,2001,12 8:30:00,31 ,3.746935,80.29256,37.42938,15.38196
sgpcmbeC1.c1,2001,12 9:30:00,31 ,11.57779,163.1553,78.67182,44.31238
sgpcmbeC1.c1,2001,1210:30:00,31 ,24.88128,237.5017,111.5002,70.43439
sgpcmbeC1.c1,2001,1211:30:00,31 ,39.51169,285.1877,116.2374,76.97927
sgpcmbeC1.c1,2001,1212:30:00,31 , 41.2442,296.5034,112.4032,74.56441
sgpcmbeC1.c1,2001,1213:30:00,30 ,47.63923,262.4725,102.5546,61.20076
sgpcmbeC1.c1,2001,1214:30:00,31 ,24.89846,232.8527,83.28722,53.03162
sgpcmbeC1.c1,2001,1215:30:00,31 ,22.50944,166.5034,68.56619,40.29552
sgpcmbeC1.c1,2001,1216:30:00,31 ,6.849491,74.42038, 35.2778,15.99019
sgpcmbeC1.c1,2001,1217:30:00,31 ,       0,  4.9247,2.568704,1.261338
sgpcmbeC1.c1,2001,1218:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,1219:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,1220:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,1221:30:00,23 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,1222:30:00,22 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,1223:30:00,18 ,       0,       0,       0,       0