datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,1999,03 0:30:00,29 ,       0,0.099404,0.003428,0.018459
sgpcmbeC1.c1,1999,03 1:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,03 2:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,03 3:30:00,30 ,       0,0.026995,  0.0009,0.004929
sgpcmbeC1.c1,1999,03 4:30:00,29 ,       0,0.054005,0.001862,0.010028
sgpcmbeC1.c1,1999,03 5:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,03 6:30:00,29 ,       0,18.13754,4.155826,5.166351
sgpcmbeC1.c1,1999,03 7:30:00,29 ,5.233838,91.28819,46.28737,25.64964
sgpcmbeC1.c1,1999,03 8:30:00,29 , 13.9875,211.1258, 107.256,50.43586
sgpcmbeC1.c1,1999,03 9:30:00,29 ,11.77936,320.7726,172.6406,85.12213
sgpcmbeC1.c1,1999,0310:30:00,29 ,13.79748,397.5794,215.4601,107.2657
sgpcmbeC1.c1,1999,0311:30:00,29 ,22.99073, 478.704,236.2344,135.0246
sgpcmbeC1.c1,1999,0312:30:00,29 ,31.90996,516.5081,251.2542,136.9341
sgpcmbeC1.c1,1999,0313:30:00,30 ,59.62533, 445.328, 233.715,112.4846
sgpcmbeC1.c1,1999,0314:30:00,30 ,81.74797,399.2259,191.4512,89.24735
sgpcmbeC1.c1,1999,0315:30:00,30 ,54.56199,  322.39,163.3214,78.68731
sgpcmbeC1.c1,1999,0316:30:00,30 ,26.25049,249.2671,111.8173,49.24047
sgpcmbeC1.c1,1999,0317:30:00,30 ,11.37608,125.4916,58.55381,26.78328
sgpcmbeC1.c1,1999,0318:30:00,30 ,0.472174,33.15686, 11.8708,8.107939
sgpcmbeC1.c1,1999,0319:30:00,29 ,       0, 0.16703, 0.00905,0.035167
sgpcmbeC1.c1,1999,0320:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,0321:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,0322:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,0323:30:00,29 ,       0,       0,       0,       0