datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2007,04 0:30:00,27 ,       0,6.871841,1.241568,  1.9909
sgpcmbeC1.c1,2007,04 1:30:00,24 ,       0, 6.75554,1.148196,1.822387
sgpcmbeC1.c1,2007,04 2:30:00,26 ,       0,6.971306, 1.08122,1.954157
sgpcmbeC1.c1,2007,04 3:30:00,25 ,       0,6.922078,0.958223,1.843731
sgpcmbeC1.c1,2007,04 4:30:00,27 ,       0,6.909555,0.751622,1.696384
sgpcmbeC1.c1,2007,04 5:30:00,29 ,       0,6.716824,1.766368, 2.03151
sgpcmbeC1.c1,2007,04 6:30:00,30 ,       0,117.9924,45.79574,32.79637
sgpcmbeC1.c1,2007,04 7:30:00,30 , 2.20392,328.5585,178.2548,96.60991
sgpcmbeC1.c1,2007,04 8:30:00,30 ,16.48691,541.5349,342.1035,157.2114
sgpcmbeC1.c1,2007,04 9:30:00,30 ,6.982819,730.0723,471.6811,218.7879
sgpcmbeC1.c1,2007,0410:30:00,30 , 16.2934,875.5521,590.6294,262.9034
sgpcmbeC1.c1,2007,0411:30:00,30 ,31.57006,965.2032,674.7659,302.6519
sgpcmbeC1.c1,2007,0412:30:00,30 ,17.99099, 998.691,664.7556,324.7541
sgpcmbeC1.c1,2007,0413:30:00,30 ,37.58538,964.7122,644.4953,296.7911
sgpcmbeC1.c1,2007,0414:30:00,30 ,35.86385,869.1464,584.9042,272.4875
sgpcmbeC1.c1,2007,0415:30:00,30 ,19.33579,719.9375,495.2756,231.6255
sgpcmbeC1.c1,2007,0416:30:00,30 ,13.74726,517.3429,350.3537,159.1046
sgpcmbeC1.c1,2007,0417:30:00,30 ,7.164357,303.2724,191.6578,93.78092
sgpcmbeC1.c1,2007,0418:30:00,30 ,3.551174,104.0529,53.34231,27.98322
sgpcmbeC1.c1,2007,0419:30:00,30 ,       0,5.133623,1.693676,1.588567
sgpcmbeC1.c1,2007,0420:30:00,29 ,       0,4.717483,0.980284,1.258083
sgpcmbeC1.c1,2007,0421:30:00,28 ,       0,5.916539,1.053095,1.560276
sgpcmbeC1.c1,2007,0422:30:00,28 ,       0,6.877647,0.976107,1.698899
sgpcmbeC1.c1,2007,0423:30:00,26 ,       0, 6.66819,1.082159,1.743366