datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2006,02 0:30:00,14 ,       0,2.468553, 0.38332,0.809108
sgpcmbeC1.c1,2006,02 1:30:00,16 ,       0,3.114379,0.447156,0.822851
sgpcmbeC1.c1,2006,02 2:30:00,18 ,       0, 3.14173,0.762006,1.128898
sgpcmbeC1.c1,2006,02 3:30:00,21 ,       0,2.990709,0.674116,1.118648
sgpcmbeC1.c1,2006,02 4:30:00,23 ,       0, 2.86408,0.616707,0.935763
sgpcmbeC1.c1,2006,02 5:30:00,22 ,       0,2.493056,0.488215,0.868306
sgpcmbeC1.c1,2006,02 6:30:00,24 ,       0,3.055942,0.515047, 0.97839
sgpcmbeC1.c1,2006,02 7:30:00,28 ,0.039236,31.72579, 6.41025,8.691771
sgpcmbeC1.c1,2006,02 8:30:00,28 ,0.144728,181.6205,75.25984, 61.2908
sgpcmbeC1.c1,2006,02 9:30:00,28 ,0.215977,364.5556,176.0762,140.3786
sgpcmbeC1.c1,2006,0210:30:00,28 ,0.469742,492.6392,275.9836,203.5234
sgpcmbeC1.c1,2006,0211:30:00,28 ,0.465256,584.8652,345.4883,227.5245
sgpcmbeC1.c1,2006,0212:30:00,28 ,1.238113,631.8418,368.6089, 244.288
sgpcmbeC1.c1,2006,0213:30:00,28 , 0.39473, 616.075,365.3826,224.9005
sgpcmbeC1.c1,2006,0214:30:00,28 ,0.368729,539.8995,342.9252,193.3756
sgpcmbeC1.c1,2006,0215:30:00,28 ,0.363976,426.2363,247.9635,150.4453
sgpcmbeC1.c1,2006,0216:30:00,28 ,0.089958,256.3649,135.0571,90.05351
sgpcmbeC1.c1,2006,0217:30:00,28 ,0.019659,84.53987,31.94974,26.84899
sgpcmbeC1.c1,2006,0218:30:00,26 ,       0, 4.90751,1.113315, 1.41931
sgpcmbeC1.c1,2006,0219:30:00,17 ,       0,2.958276,0.585233,1.033297
sgpcmbeC1.c1,2006,0220:30:00,14 ,       0,2.673853,0.454476,0.922826
sgpcmbeC1.c1,2006,0221:30:00,14 ,       0,3.092894,0.648844,0.938386
sgpcmbeC1.c1,2006,0222:30:00,14 ,       0,2.797347,0.635957,1.025687
sgpcmbeC1.c1,2006,0223:30:00,15 ,       0,1.866825,0.271321, 0.59759