datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2006,02 0:30:00,17 ,       0,0.257987,0.042348,0.080538
sgpcmbeC1.c1,2006,02 1:30:00,19 ,       0,0.119002,0.010778,0.032641
sgpcmbeC1.c1,2006,02 2:30:00,20 ,       0,0.123916, 0.01324,0.031385
sgpcmbeC1.c1,2006,02 3:30:00,23 ,       0,0.169379,0.008883,0.035735
sgpcmbeC1.c1,2006,02 4:30:00,25 ,       0,0.423894,0.024682,0.088174
sgpcmbeC1.c1,2006,02 5:30:00,24 ,       0,0.183436,0.026361,0.058375
sgpcmbeC1.c1,2006,02 6:30:00,24 ,       0,0.111071,0.013706,0.032844
sgpcmbeC1.c1,2006,02 7:30:00,28 ,1.548077,16.45673,6.900742,4.625725
sgpcmbeC1.c1,2006,02 8:30:00,28 ,1.744853,33.17768,16.45884,7.141376
sgpcmbeC1.c1,2006,02 9:30:00,28 , 3.30491,40.03432,16.43691,8.648085
sgpcmbeC1.c1,2006,0210:30:00,28 , 5.04612,39.70118, 16.5695,11.34149
sgpcmbeC1.c1,2006,0211:30:00,28 ,3.889332,42.91476,15.85539, 13.8441
sgpcmbeC1.c1,2006,0212:30:00,28 , 0.54085,54.23907,13.35877,14.07844
sgpcmbeC1.c1,2006,0213:30:00,28 ,2.783273,37.41924,15.08538,11.59551
sgpcmbeC1.c1,2006,0214:30:00,28 ,2.952594, 38.9354,15.41235, 11.1056
sgpcmbeC1.c1,2006,0215:30:00,28 ,4.919959,49.02798,16.81077,10.84046
sgpcmbeC1.c1,2006,0216:30:00,28 , 7.69077,34.77218,17.77581, 7.13875
sgpcmbeC1.c1,2006,0217:30:00,28 ,1.852216, 24.3499,13.27997,5.643775
sgpcmbeC1.c1,2006,0218:30:00,24 ,       0,5.891389,1.210387, 1.45934
sgpcmbeC1.c1,2006,0219:30:00,17 ,       0, 0.00308,0.000181,0.000747
sgpcmbeC1.c1,2006,0220:30:00,15 ,       0,0.068276,0.004871,0.017584
sgpcmbeC1.c1,2006,0221:30:00,16 ,       0,0.198372,0.014313,0.049674
sgpcmbeC1.c1,2006,0222:30:00,17 ,       0,0.286927,0.016925,0.069578
sgpcmbeC1.c1,2006,0223:30:00,18 ,       0,0.035555,0.002623,0.008664