datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2004,03 0:30:00,31 ,       0,0.159903, 0.01548,  0.0425
sgpcmbeC1.c1,2004,03 1:30:00,31 ,       0,0.285557, 0.01945,0.059379
sgpcmbeC1.c1,2004,03 2:30:00,31 ,       0,0.200604,0.018812,0.046107
sgpcmbeC1.c1,2004,03 3:30:00,31 ,       0,0.271247,0.017894,0.052685
sgpcmbeC1.c1,2004,03 4:30:00,31 ,       0,0.045698,0.001979,0.008587
sgpcmbeC1.c1,2004,03 5:30:00,31 ,       0,0.038048,0.001227,0.006834
sgpcmbeC1.c1,2004,03 6:30:00,31 ,       0,8.197338,1.784619,2.165761
sgpcmbeC1.c1,2004,03 7:30:00,31 ,       0,16.96837, 9.53978,5.551014
sgpcmbeC1.c1,2004,03 8:30:00,31 ,0.624602,28.15501,11.47771,6.612922
sgpcmbeC1.c1,2004,03 9:30:00,31 ,0.755823, 32.6384,10.13088,7.178572
sgpcmbeC1.c1,2004,0310:30:00,31 ,2.021217,29.61349,8.715976,5.942048
sgpcmbeC1.c1,2004,0311:30:00,31 ,1.915202,41.28523, 9.34224,  10.746
sgpcmbeC1.c1,2004,0312:30:00,31 ,0.363633,32.09092,7.931133,10.03286
sgpcmbeC1.c1,2004,0313:30:00,31 ,1.180551,41.00386,11.81405,12.87451
sgpcmbeC1.c1,2004,0314:30:00,31 ,0.959175,41.45987,14.84737,13.18599
sgpcmbeC1.c1,2004,0315:30:00,31 ,1.053985,42.91566,13.58639,9.453463
sgpcmbeC1.c1,2004,0316:30:00,31 , 0.70734,37.85373,12.24542,7.281007
sgpcmbeC1.c1,2004,0317:30:00,31 ,1.078094,19.91837, 10.9353,5.406182
sgpcmbeC1.c1,2004,0318:30:00,31 ,0.009783,9.782476,4.727903,2.803435
sgpcmbeC1.c1,2004,0319:30:00,31 ,       0,0.222944,0.013738,0.046287
sgpcmbeC1.c1,2004,0320:30:00,31 ,       0,0.272625,0.015629,0.059354
sgpcmbeC1.c1,2004,0321:30:00,31 ,       0,0.197194, 0.01734,0.048553
sgpcmbeC1.c1,2004,0322:30:00,31 ,       0,0.886843,0.038989,0.162426
sgpcmbeC1.c1,2004,0323:30:00,31 ,       0,0.403782,0.027096,0.083393