datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,1997,12 0:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,12 1:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,12 2:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,12 3:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,12 4:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,12 5:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,12 6:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,12 7:30:00,29 ,0.000032,8.236994,1.601151,2.269381
sgpcmbeC1.c1,1997,12 8:30:00,29 ,0.026741,115.7817,39.24768,41.11472
sgpcmbeC1.c1,1997,12 9:30:00,30 ,0.069996,269.8848,104.5226,112.7075
sgpcmbeC1.c1,1997,1210:30:00,30 ,0.036934,393.1043,169.4481, 182.171
sgpcmbeC1.c1,1997,1211:30:00,29 ,0.001682, 469.778,216.5655,218.4431
sgpcmbeC1.c1,1997,1212:30:00,29 ,0.041389,490.9279,222.5093,229.9775
sgpcmbeC1.c1,1997,1213:30:00,29 ,0.095924,452.0636,200.2626,205.7116
sgpcmbeC1.c1,1997,1214:30:00,29 ,0.076637,366.7309,152.2603,163.4055
sgpcmbeC1.c1,1997,1215:30:00,29 ,0.026352,243.2132,100.6258,  103.39
sgpcmbeC1.c1,1997,1216:30:00,29 ,0.000014,92.86267,34.77929,37.41496
sgpcmbeC1.c1,1997,1217:30:00,29 ,       0,3.971578,0.831409,1.188704
sgpcmbeC1.c1,1997,1218:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,1219:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,1220:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,1221:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,1222:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,1223:30:00,30 ,       0,       0,       0,       0