datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2004,12 0:30:00,31 ,       0,0.857111,0.077555,0.200606
sgpcmbeC1.c1,2004,12 1:30:00,31 ,       0,0.560384,0.039389,0.119389
sgpcmbeC1.c1,2004,12 2:30:00,31 ,       0, 0.31529,0.017936,0.063477
sgpcmbeC1.c1,2004,12 3:30:00,31 ,       0, 0.22364,0.017337,0.049188
sgpcmbeC1.c1,2004,12 4:30:00,31 ,       0,0.255381, 0.01286,0.049815
sgpcmbeC1.c1,2004,12 5:30:00,31 ,       0,0.018711,0.000604,0.003361
sgpcmbeC1.c1,2004,12 6:30:00,31 ,       0,0.000163,5.243E-6,0.000029
sgpcmbeC1.c1,2004,12 7:30:00,31 ,0.000264,11.13246,2.654544,2.969407
sgpcmbeC1.c1,2004,12 8:30:00,31 ,0.087873,131.3453,  65.046,43.20904
sgpcmbeC1.c1,2004,12 9:30:00,31 ,0.218678,293.7093, 158.399,103.7198
sgpcmbeC1.c1,2004,1210:30:00,31 ,0.157204,423.4925, 257.652,152.7058
sgpcmbeC1.c1,2004,1211:30:00,31 , 0.01141,499.6411,325.1818,183.0681
sgpcmbeC1.c1,2004,1212:30:00,31 ,0.136841,518.0624,336.9471,195.3318
sgpcmbeC1.c1,2004,1213:30:00,31 ,0.542358,471.5549,334.7746,166.6381
sgpcmbeC1.c1,2004,1214:30:00,31 ,0.026011,377.6514,251.6226,141.9329
sgpcmbeC1.c1,2004,1215:30:00,31 ,       0,238.6678,151.3284,87.52414
sgpcmbeC1.c1,2004,1216:30:00,31 ,0.000023,81.64768,45.86897,30.85724
sgpcmbeC1.c1,2004,1217:30:00,31 ,       0,2.456892,0.785653,0.688048
sgpcmbeC1.c1,2004,1218:30:00,31 ,       0,0.169029,0.049317,0.059469
sgpcmbeC1.c1,2004,1219:30:00,31 ,       0,0.216676,0.050836,0.072555
sgpcmbeC1.c1,2004,1220:30:00,31 ,       0,0.349283,0.105985,0.124033
sgpcmbeC1.c1,2004,1221:30:00,31 ,       0, 0.41681,0.066412,0.112938
sgpcmbeC1.c1,2004,1222:30:00,31 ,       0,0.327623,0.057491, 0.09917
sgpcmbeC1.c1,2004,1223:30:00,31 ,       0,0.616944,0.042929,0.130839