datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2002,07 0:30:00,31 ,       0,0.236345,0.007624,0.042449
sgpcmbeC1.c1,2002,07 1:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,07 2:30:00,31 ,       0, 0.02664,0.000859,0.004785
sgpcmbeC1.c1,2002,07 3:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,07 4:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,07 5:30:00,31 ,       0, 6.31191,3.248056, 1.59506
sgpcmbeC1.c1,2002,07 6:30:00,31 ,1.147446,19.98568,11.53596,4.397852
sgpcmbeC1.c1,2002,07 7:30:00,31 ,2.251974,35.06264,13.24442,6.242886
sgpcmbeC1.c1,2002,07 8:30:00,31 ,3.246879,33.11782,14.08261,7.888964
sgpcmbeC1.c1,2002,07 9:30:00,31 ,6.934254,46.47909,17.10694,12.71207
sgpcmbeC1.c1,2002,0710:30:00,31 ,3.917672,62.81384,21.11086,19.10886
sgpcmbeC1.c1,2002,0711:30:00,31 ,2.321203,61.94777,28.25031,22.88673
sgpcmbeC1.c1,2002,0712:30:00,31 ,0.506139,63.70565,27.95177,21.81529
sgpcmbeC1.c1,2002,0713:30:00,31 ,2.144557, 74.7029,31.00495, 22.4217
sgpcmbeC1.c1,2002,0714:30:00,31 , 4.00897,65.93881,26.81076,19.32516
sgpcmbeC1.c1,2002,0715:30:00,31 ,5.031842,55.86174,27.10582, 16.4267
sgpcmbeC1.c1,2002,0716:30:00,31 , 4.30814,  43.798,21.52277,12.12855
sgpcmbeC1.c1,2002,0717:30:00,31 ,3.065807,36.80924,17.86452,8.623946
sgpcmbeC1.c1,2002,0718:30:00,31 ,0.216788,24.50816, 13.2521,5.655788
sgpcmbeC1.c1,2002,0719:30:00,31 ,       0,8.261492,5.080313,2.551893
sgpcmbeC1.c1,2002,0720:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0721:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0722:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0723:30:00,31 ,       0,0.015343,0.000495,0.002756