datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2007,12 0:30:00,16 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,12 1:30:00,17 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,12 2:30:00,17 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,12 3:30:00,17 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,12 4:30:00,17 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,12 5:30:00,19 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,12 6:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,12 7:30:00,30 ,       0,21.41849,6.036926,  5.8269
sgpcmbeC1.c1,2007,12 8:30:00,30 ,2.171919,70.28053, 29.8716,20.67588
sgpcmbeC1.c1,2007,12 9:30:00,30 ,3.058449,114.7126,34.19432,23.50119
sgpcmbeC1.c1,2007,1210:30:00,30 ,4.182056,127.4361,34.02677,27.46488
sgpcmbeC1.c1,2007,1211:30:00,30 ,2.195629,90.24028,25.51344,19.98344
sgpcmbeC1.c1,2007,1212:30:00,30 ,2.256269, 163.972,25.04504,34.94701
sgpcmbeC1.c1,2007,1213:30:00,30 ,3.819115,143.9914,28.21454,27.48704
sgpcmbeC1.c1,2007,1214:30:00,30 ,3.990257,121.3118,37.84728,27.56034
sgpcmbeC1.c1,2007,1215:30:00,30 ,3.006683,87.26859, 38.8699,23.43617
sgpcmbeC1.c1,2007,1216:30:00,30 ,4.994672, 50.9579,29.17777,17.90126
sgpcmbeC1.c1,2007,1217:30:00,30 ,       0,11.83177,4.570479,   3.651
sgpcmbeC1.c1,2007,1218:30:00,28 ,       0,1.554886,0.142559,0.382649
sgpcmbeC1.c1,2007,1219:30:00,26 ,       0,1.477365,0.083595,0.315308
sgpcmbeC1.c1,2007,1220:30:00,22 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,1221:30:00,19 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,1222:30:00,19 ,       0,0.103245,0.005434,0.023686
sgpcmbeC1.c1,2007,1223:30:00,15 ,       0,       0,       0,       0