datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,1998,12 0:30:00,23 ,       0,0.056035,0.002436,0.011684
sgpcmbeC1.c1,1998,12 1:30:00,24 ,       0,0.027597, 0.00115,0.005633
sgpcmbeC1.c1,1998,12 2:30:00,25 ,       0,0.053461,0.002138,0.010692
sgpcmbeC1.c1,1998,12 3:30:00,25 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,12 4:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,12 5:30:00,28 ,       0, 0.00473,0.000169,0.000894
sgpcmbeC1.c1,1998,12 6:30:00,29 ,       0,0.024343,0.000839, 0.00452
sgpcmbeC1.c1,1998,12 7:30:00,29 ,0.003507,8.012434,1.670485, 2.11599
sgpcmbeC1.c1,1998,12 8:30:00,29 ,0.066853,111.9988,44.00897,40.13616
sgpcmbeC1.c1,1998,12 9:30:00,29 ,0.323822,260.8167,125.4755,101.9963
sgpcmbeC1.c1,1998,1210:30:00,28 ,0.045898,379.6945, 208.143,150.5562
sgpcmbeC1.c1,1998,1211:30:00,29 ,0.012886,  453.77,241.3734,193.3444
sgpcmbeC1.c1,1998,1212:30:00,28 ,       0,481.6503,299.2597,196.7989
sgpcmbeC1.c1,1998,1213:30:00,27 ,  0.0509,450.0276,263.3256,189.6162
sgpcmbeC1.c1,1998,1214:30:00,27 ,0.021688,363.5645,210.1025,152.4143
sgpcmbeC1.c1,1998,1215:30:00,27 ,0.047047,231.9254,125.0291,93.75804
sgpcmbeC1.c1,1998,1216:30:00,28 ,0.041832,126.6033,38.88542,34.29026
sgpcmbeC1.c1,1998,1217:30:00,27 ,       0,2.214016,0.479359,0.604722
sgpcmbeC1.c1,1998,1218:30:00,27 ,       0,0.044584,0.001651, 0.00858
sgpcmbeC1.c1,1998,1219:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,1220:30:00,25 ,       0,0.044635,0.001785,0.008927
sgpcmbeC1.c1,1998,1221:30:00,26 ,       0, 0.05797, 0.00223,0.011369
sgpcmbeC1.c1,1998,1222:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,1223:30:00,25 ,       0,0.114115,0.004565,0.022823