datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2001,03 0:30:00,24 ,       0,1.542901,0.112156,0.384395
sgpcmbeC1.c1,2001,03 1:30:00,26 ,       0,1.591982,0.098922,0.360021
sgpcmbeC1.c1,2001,03 2:30:00,24 ,       0,1.337634,0.123995,0.369022
sgpcmbeC1.c1,2001,03 3:30:00,23 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,03 4:30:00,21 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,03 5:30:00,24 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,03 6:30:00,31 ,       0,31.24744,6.024938,6.891621
sgpcmbeC1.c1,2001,03 7:30:00,31 ,8.655738,69.98231,35.01131,18.64464
sgpcmbeC1.c1,2001,03 8:30:00,31 ,8.927808,95.23122,47.08589, 22.6316
sgpcmbeC1.c1,2001,03 9:30:00,31 ,9.188313,132.3255,55.34274,32.05356
sgpcmbeC1.c1,2001,0310:30:00,31 ,16.98663,178.7115,64.64011,42.25008
sgpcmbeC1.c1,2001,0311:30:00,31 ,11.68658,211.5334,58.58069,45.54007
sgpcmbeC1.c1,2001,0312:30:00,31 ,3.503594,255.0719,79.30376,64.62857
sgpcmbeC1.c1,2001,0313:30:00,31 ,  13.358,186.4438,72.11478,57.46484
sgpcmbeC1.c1,2001,0314:30:00,31 ,14.09525,234.3559,80.86672, 70.8025
sgpcmbeC1.c1,2001,0315:30:00,31 ,15.41269,222.4299,70.24636,49.26444
sgpcmbeC1.c1,2001,0316:30:00,31 ,5.958737,151.4786,61.45458,35.85199
sgpcmbeC1.c1,2001,0317:30:00,31 ,6.131944, 114.294,46.63355, 27.9555
sgpcmbeC1.c1,2001,0318:30:00,31 ,1.909191,39.63278,14.55811,10.04112
sgpcmbeC1.c1,2001,0319:30:00,31 ,       0,1.595924,0.099954,0.387093
sgpcmbeC1.c1,2001,0320:30:00,29 ,       0,1.480048,0.074469,0.298299
sgpcmbeC1.c1,2001,0321:30:00,27 ,       0, 1.57067,0.059899,0.302064
sgpcmbeC1.c1,2001,0322:30:00,28 ,       0,1.525024,0.101406,0.373436
sgpcmbeC1.c1,2001,0323:30:00,27 ,       0,1.451664,0.103933,0.374702