datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2004,12 0:30:00,31 ,       0,0.009997,0.000322,0.001796
sgpcmbeC1.c1,2004,12 1:30:00,31 ,       0,0.186244,0.007516,0.034216
sgpcmbeC1.c1,2004,12 2:30:00,31 ,       0, 0.79229,0.029888,0.143533
sgpcmbeC1.c1,2004,12 3:30:00,31 ,       0,0.136015,0.004388,0.024429
sgpcmbeC1.c1,2004,12 4:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,12 5:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,12 6:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,12 7:30:00,31 ,0.108788,6.571286,2.971498,1.827537
sgpcmbeC1.c1,2004,12 8:30:00,31 ,1.151385,16.66361,9.684868,4.265201
sgpcmbeC1.c1,2004,12 9:30:00,31 ,2.316258, 20.5819,9.665508,4.349918
sgpcmbeC1.c1,2004,1210:30:00,31 ,1.849875,27.91661,9.227888,7.197048
sgpcmbeC1.c1,2004,1211:30:00,31 ,1.615731,24.67836,7.570366,6.922914
sgpcmbeC1.c1,2004,1212:30:00,31 ,0.268567,27.72668,5.020085, 7.10173
sgpcmbeC1.c1,2004,1213:30:00,31 ,1.860542,33.78836,7.574628, 7.82776
sgpcmbeC1.c1,2004,1214:30:00,31 ,0.832161,25.25828, 7.76267,4.846354
sgpcmbeC1.c1,2004,1215:30:00,31 ,0.368576,20.78892,10.02769, 4.26225
sgpcmbeC1.c1,2004,1216:30:00,31 ,1.390594,14.48654,9.432317,3.025539
sgpcmbeC1.c1,2004,1217:30:00,29 ,       0,3.852439,1.663251,0.861813
sgpcmbeC1.c1,2004,1218:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,1219:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,1220:30:00,31 ,       0,0.057472,0.001854,0.010322
sgpcmbeC1.c1,2004,1221:30:00,31 ,       0,0.087502,0.002823,0.015716
sgpcmbeC1.c1,2004,1222:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,1223:30:00,31 ,       0,       0,       0,       0