datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2004,03 0:30:00,29 ,       0,0.020643,0.000712,0.003833
sgpcmbeC1.c1,2004,03 1:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,03 2:30:00,30 ,       0,0.153805, 0.00576,0.028175
sgpcmbeC1.c1,2004,03 3:30:00,31 ,       0,0.019194,0.001065,0.003925
sgpcmbeC1.c1,2004,03 4:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,03 5:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,03 6:30:00,31 ,       0,7.768104,1.240571,1.974798
sgpcmbeC1.c1,2004,03 7:30:00,31 ,       0,47.48025,20.13532,13.92103
sgpcmbeC1.c1,2004,03 8:30:00,31 ,0.589959,93.66588,51.50417,30.16028
sgpcmbeC1.c1,2004,03 9:30:00,31 ,0.499012,131.6277, 79.8016,44.96291
sgpcmbeC1.c1,2004,0310:30:00,31 ,2.991142,157.2758,100.5616,54.78455
sgpcmbeC1.c1,2004,0311:30:00,31 ,4.903569,171.6055, 114.334,58.92568
sgpcmbeC1.c1,2004,0312:30:00,31 , 3.78737,175.5648,123.9973,57.14504
sgpcmbeC1.c1,2004,0313:30:00,31 ,3.743081,169.9763,125.5707,49.78947
sgpcmbeC1.c1,2004,0314:30:00,31 ,  3.0062,155.6475,111.7343,46.77682
sgpcmbeC1.c1,2004,0315:30:00,31 ,1.361727,  129.57, 86.6529,40.00615
sgpcmbeC1.c1,2004,0316:30:00,31 ,5.365736,96.30681,59.48219,30.49149
sgpcmbeC1.c1,2004,0317:30:00,31 ,1.221524,54.05235,30.24052,16.22237
sgpcmbeC1.c1,2004,0318:30:00,31 , 0.00202,13.50118, 4.37649,3.323406
sgpcmbeC1.c1,2004,0319:30:00,31 ,       0,0.026236,0.000846,0.004712
sgpcmbeC1.c1,2004,0320:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,0321:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,0322:30:00,31 ,       0,0.428477,0.013822,0.076957
sgpcmbeC1.c1,2004,0323:30:00,29 ,       0, 0.12768,  0.0061,0.025103