datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2007,01 0:30:00,30 ,       0,21.25907,1.671109,4.376996
sgpcmbeC1.c1,2007,01 1:30:00,29 ,       0,12.47908,  1.5827,3.017823
sgpcmbeC1.c1,2007,01 2:30:00,29 ,       0,5.359087,0.742397,1.451385
sgpcmbeC1.c1,2007,01 3:30:00,30 ,       0,11.44328,1.012101,2.450928
sgpcmbeC1.c1,2007,01 4:30:00,28 ,       0,14.94357,1.121783,3.026063
sgpcmbeC1.c1,2007,01 5:30:00,29 ,       0,12.92085,1.261161,2.953065
sgpcmbeC1.c1,2007,01 6:30:00,30 ,       0,17.10497, 1.72499,3.834811
sgpcmbeC1.c1,2007,01 7:30:00,31 ,       0,10.67336,2.547113,  2.3794
sgpcmbeC1.c1,2007,01 8:30:00,30 ,0.561353, 48.8645,12.77507,10.04798
sgpcmbeC1.c1,2007,01 9:30:00,31 ,0.389513,62.67805,14.02158, 12.9457
sgpcmbeC1.c1,2007,0110:30:00,31 ,0.525167,46.01855,12.47586,10.85933
sgpcmbeC1.c1,2007,0111:30:00,31 ,1.807522,45.69211,12.39943,9.986806
sgpcmbeC1.c1,2007,0112:30:00,31 ,0.308652,41.20991,10.63149,11.40864
sgpcmbeC1.c1,2007,0113:30:00,31 ,2.269109,60.63969,13.16316,12.17317
sgpcmbeC1.c1,2007,0114:30:00,31 ,3.102627,62.66224,14.82922,12.88011
sgpcmbeC1.c1,2007,0115:30:00,31 ,0.847366,52.81207,14.34923,10.70883
sgpcmbeC1.c1,2007,0116:30:00,31 ,1.603607,34.34544,12.96148, 8.48441
sgpcmbeC1.c1,2007,0117:30:00,31 ,       0,27.62304,6.599439,6.232277
sgpcmbeC1.c1,2007,0118:30:00,30 ,       0,6.090736,0.515298,1.540624
sgpcmbeC1.c1,2007,0119:30:00,31 ,       0,9.533153,1.190532,2.601567
sgpcmbeC1.c1,2007,0120:30:00,29 ,       0,14.03158,1.265699,3.497232
sgpcmbeC1.c1,2007,0121:30:00,29 ,       0,15.66818,1.663504,3.888619
sgpcmbeC1.c1,2007,0122:30:00,28 ,       0,12.72794, 1.29407,3.150858
sgpcmbeC1.c1,2007,0123:30:00,30 ,       0,7.584299,0.806872, 1.90921