datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,1997,07 0:30:00,31 ,       0,0.056688,0.001829,0.010182
sgpcmbeC1.c1,1997,07 1:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,07 2:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,07 3:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,07 4:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,07 5:30:00,31 ,0.007917,9.366735,3.113275,2.736676
sgpcmbeC1.c1,1997,07 6:30:00,31 ,1.020865,53.10451,26.09276,13.95288
sgpcmbeC1.c1,1997,07 7:30:00,30 ,3.713543,89.95211,58.37579,25.41433
sgpcmbeC1.c1,1997,07 8:30:00,31 ,4.849776,  125.47,88.57462,38.43943
sgpcmbeC1.c1,1997,07 9:30:00,31 ,8.411502,156.3702,114.2812,43.09367
sgpcmbeC1.c1,1997,0710:30:00,31 ,9.380018,168.9828,131.0446,42.51715
sgpcmbeC1.c1,1997,0711:30:00,31 ,37.36646,187.5046,143.6336,33.20471
sgpcmbeC1.c1,1997,0712:30:00,31 ,23.11507, 183.003,141.5191,41.49654
sgpcmbeC1.c1,1997,0713:30:00,31 ,12.53297, 190.517, 145.205,34.90145
sgpcmbeC1.c1,1997,0714:30:00,31 ,19.08163,170.7167,136.0483,35.63085
sgpcmbeC1.c1,1997,0715:30:00,31 ,13.12266,149.8848,121.8929,30.87412
sgpcmbeC1.c1,1997,0716:30:00,31 ,7.455637,141.2346,101.7631,30.28747
sgpcmbeC1.c1,1997,0717:30:00,31 ,  4.4767,94.44603,68.51596,23.06127
sgpcmbeC1.c1,1997,0718:30:00,31 ,5.290934,52.70712,34.58271,13.69216
sgpcmbeC1.c1,1997,0719:30:00,31 ,2.362631,13.15196,6.863238,3.493704
sgpcmbeC1.c1,1997,0720:30:00,31 ,       0,0.028474,0.001187,0.005279
sgpcmbeC1.c1,1997,0721:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,0722:30:00,31 ,       0,0.039878,0.001286,0.007162
sgpcmbeC1.c1,1997,0723:30:00,31 ,       0,0.057661, 0.00186,0.010356