datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2006,04 0:30:00,30 ,       0,52.00881,7.866981,14.69635
sgpcmbeC1.c1,2006,04 1:30:00,30 ,       0,159.2892, 18.5533,43.51159
sgpcmbeC1.c1,2006,04 2:30:00,30 ,       0,166.4541,12.19323,  32.146
sgpcmbeC1.c1,2006,04 3:30:00,30 ,       0,83.89239,9.689466,20.16336
sgpcmbeC1.c1,2006,04 4:30:00,30 ,       0,68.86213,8.286449,16.92321
sgpcmbeC1.c1,2006,04 5:30:00,29 ,       0,216.1352,16.23637,42.18372
sgpcmbeC1.c1,2006,04 6:30:00,29 ,       0,358.7915,31.50111,77.49867
sgpcmbeC1.c1,2006,04 7:30:00,29 ,       0,359.9372,31.38406,79.63663
sgpcmbeC1.c1,2006,04 8:30:00,29 ,       0,341.6115,17.04493,63.80676
sgpcmbeC1.c1,2006,04 9:30:00,29 ,       0,380.1839, 23.1791,74.29523
sgpcmbeC1.c1,2006,0410:30:00,29 ,       0,423.0069,37.06348,90.99641
sgpcmbeC1.c1,2006,0411:30:00,29 ,       0,317.8268,29.40981,76.84755
sgpcmbeC1.c1,2006,0412:30:00,30 ,       0,184.0059,19.56232,45.57577
sgpcmbeC1.c1,2006,0413:30:00,30 ,       0,227.2828,19.30564,48.37742
sgpcmbeC1.c1,2006,0414:30:00,30 ,       0,233.8269, 25.4531,59.76361
sgpcmbeC1.c1,2006,0415:30:00,30 ,       0,335.2519,31.36198, 84.6198
sgpcmbeC1.c1,2006,0416:30:00,29 ,       0, 341.618,28.56762,73.64226
sgpcmbeC1.c1,2006,0417:30:00,29 ,       0,172.3073,15.09223,36.90769
sgpcmbeC1.c1,2006,0418:30:00,29 ,       0,183.6605,8.931886,34.05455
sgpcmbeC1.c1,2006,0419:30:00,29 ,       0,142.4151,10.97789,30.90104
sgpcmbeC1.c1,2006,0420:30:00,29 ,       0, 63.1461,6.583757,15.95174
sgpcmbeC1.c1,2006,0421:30:00,30 ,       0, 156.541,15.69554,34.34965
sgpcmbeC1.c1,2006,0422:30:00,30 ,       0,77.56973,10.45704,19.40352
sgpcmbeC1.c1,2006,0423:30:00,30 ,       0,62.59932,10.06621, 18.0512