datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2002,12 0:30:00,31 ,       0,0.138005,0.004491, 0.02478
sgpcmbeC1.c1,2002,12 1:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,12 2:30:00,31 ,       0,0.044235,0.003845,0.012102
sgpcmbeC1.c1,2002,12 3:30:00,31 ,       0,0.044532,0.001555,0.008003
sgpcmbeC1.c1,2002,12 4:30:00,31 ,       0,0.001216,0.000039,0.000218
sgpcmbeC1.c1,2002,12 5:30:00,31 ,       0, 0.22519,0.010756,0.044287
sgpcmbeC1.c1,2002,12 6:30:00,31 ,       0,0.086712,0.002797,0.015574
sgpcmbeC1.c1,2002,12 7:30:00,31 ,       0,8.777282,2.995889,2.593494
sgpcmbeC1.c1,2002,12 8:30:00,31 ,       0,60.59756,13.79957,13.00985
sgpcmbeC1.c1,2002,12 9:30:00,31 ,0.966068,59.26614,14.84068,12.53539
sgpcmbeC1.c1,2002,1210:30:00,31 ,1.316422,61.58952,13.20144,12.45434
sgpcmbeC1.c1,2002,1211:30:00,31 ,2.013532,44.59464,11.07971,10.89006
sgpcmbeC1.c1,2002,1212:30:00,31 ,0.364616,108.9264, 15.3443,23.31721
sgpcmbeC1.c1,2002,1213:30:00,31 , 0.91938,91.27752,14.32661,17.30527
sgpcmbeC1.c1,2002,1214:30:00,31 ,1.216756,102.9213,16.99251,19.51655
sgpcmbeC1.c1,2002,1215:30:00,31 ,0.445677,56.37347,  14.862,12.83242
sgpcmbeC1.c1,2002,1216:30:00,31 ,0.680863,40.15131,12.60117,10.42174
sgpcmbeC1.c1,2002,1217:30:00,31 ,       0,9.471528,2.202891,2.405015
sgpcmbeC1.c1,2002,1218:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,1219:30:00,31 ,       0,0.023731,0.000766,0.004262
sgpcmbeC1.c1,2002,1220:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,1221:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,1222:30:00,31 ,       0,0.000865,0.000028,0.000155
sgpcmbeC1.c1,2002,1223:30:00,31 ,       0,0.018549,0.000598,0.003332