datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2004,01 0:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,01 1:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,01 2:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,01 3:30:00,25 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,01 4:30:00,25 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,01 5:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,01 6:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,01 7:30:00,31 ,       0,6.939966,2.134974,1.863245
sgpcmbeC1.c1,2004,01 8:30:00,31 ,4.023078,67.65457,36.51532,17.38237
sgpcmbeC1.c1,2004,01 9:30:00,31 , 21.6648,152.5647,77.06802,35.82385
sgpcmbeC1.c1,2004,0110:30:00,31 ,40.47265,232.3821,111.2361,52.82866
sgpcmbeC1.c1,2004,0111:30:00,31 , 33.0207,264.3228,128.7902,71.10875
sgpcmbeC1.c1,2004,0112:30:00,31 ,36.88882,276.0933,135.3829,75.34049
sgpcmbeC1.c1,2004,0113:30:00,31 ,49.66941,276.6187,121.6982,68.24035
sgpcmbeC1.c1,2004,0114:30:00,31 ,49.18053,213.1965,108.7601,51.61847
sgpcmbeC1.c1,2004,0115:30:00,31 ,24.24789,199.9819,86.38384,42.07591
sgpcmbeC1.c1,2004,0116:30:00,31 ,15.29496,90.29624,50.35866,19.09501
sgpcmbeC1.c1,2004,0117:30:00,31 ,1.745402, 16.9243,7.731181,4.341771
sgpcmbeC1.c1,2004,0118:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,0119:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,0120:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,0121:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,0122:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,0123:30:00,29 ,       0,       0,       0,       0