datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2003,01 0:30:00,25 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,01 1:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,01 2:30:00,21 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,01 3:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,01 4:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,01 5:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,01 6:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,01 7:30:00,31 ,       0, 9.17807, 5.09623,2.357056
sgpcmbeC1.c1,2003,01 8:30:00,31 ,6.188207,35.78431,14.83151,8.334732
sgpcmbeC1.c1,2003,01 9:30:00,31 ,2.585266,35.05999,13.67108,10.87111
sgpcmbeC1.c1,2003,0110:30:00,31 ,0.942436,80.79065,16.10674, 17.9828
sgpcmbeC1.c1,2003,0111:30:00,31 ,0.418064,150.2481,25.01261,35.74163
sgpcmbeC1.c1,2003,0112:30:00,31 ,0.260989,92.02917,  20.374,24.49826
sgpcmbeC1.c1,2003,0113:30:00,31 ,0.370293,158.5774,24.47747,33.17907
sgpcmbeC1.c1,2003,0114:30:00,31 ,0.943903, 58.0256,15.65089,17.42221
sgpcmbeC1.c1,2003,0115:30:00,31 ,1.657266, 60.9962,17.79555,17.04316
sgpcmbeC1.c1,2003,0116:30:00,31 ,5.586094,42.26659,14.14168, 9.09502
sgpcmbeC1.c1,2003,0117:30:00,31 , 2.29307,20.21567,10.26324,4.736928
sgpcmbeC1.c1,2003,0118:30:00,31 ,       0,0.417985,0.013483,0.075072
sgpcmbeC1.c1,2003,0119:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,0120:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,0121:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,0122:30:00,24 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,0123:30:00,24 ,       0,       0,       0,       0