datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,1998,07 0:30:00,31 ,       0,0.861541,0.053206,0.206172
sgpcmbeC1.c1,1998,07 1:30:00,31 ,       0,2.000226,0.083208,0.370665
sgpcmbeC1.c1,1998,07 2:30:00,31 ,       0,1.743834, 0.07866,0.319126
sgpcmbeC1.c1,1998,07 3:30:00,31 ,       0, 0.34597,0.023406,0.084243
sgpcmbeC1.c1,1998,07 4:30:00,31 ,       0,1.029496,0.057467, 0.22531
sgpcmbeC1.c1,1998,07 5:30:00,31 ,0.342943,20.51971,9.594622,6.163039
sgpcmbeC1.c1,1998,07 6:30:00,31 ,1.847268,152.1996,92.04478, 49.4674
sgpcmbeC1.c1,1998,07 7:30:00,31 ,10.07255,340.3553,235.4437,114.2018
sgpcmbeC1.c1,1998,07 8:30:00,31 ,46.97486,530.5989,395.3269,162.0131
sgpcmbeC1.c1,1998,07 9:30:00,31 ,97.95113,707.3837,560.0385,192.7312
sgpcmbeC1.c1,1998,0710:30:00,31 ,157.5193,835.3054,713.8179,185.9251
sgpcmbeC1.c1,1998,0711:30:00,31 , 279.039,929.3136,808.7642,156.1878
sgpcmbeC1.c1,1998,0712:30:00,31 ,655.6094,985.3155,894.4981,75.21749
sgpcmbeC1.c1,1998,0713:30:00,31 ,641.2776,973.5004,846.0381,84.70145
sgpcmbeC1.c1,1998,0714:30:00,31 ,347.9325,877.7714,779.1992,109.0191
sgpcmbeC1.c1,1998,0715:30:00,31 , 420.052,735.7733, 636.278, 82.2697
sgpcmbeC1.c1,1998,0716:30:00,31 ,62.67192,576.2394,471.5843, 125.747
sgpcmbeC1.c1,1998,0717:30:00,31 ,19.29095,388.6483,302.9317,83.91657
sgpcmbeC1.c1,1998,0718:30:00,31 , 23.3286,182.9792, 139.722,40.37002
sgpcmbeC1.c1,1998,0719:30:00,31 ,3.931883,35.11294,20.88701,8.546625
sgpcmbeC1.c1,1998,0720:30:00,31 ,       0,0.408829,0.013188,0.073428
sgpcmbeC1.c1,1998,0721:30:00,31 ,       0,0.330359,0.010657,0.059334
sgpcmbeC1.c1,1998,0722:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,0723:30:00,31 ,       0,0.107849,0.003479, 0.01937