datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2004,04 0:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,04 1:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,04 2:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,04 3:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,04 4:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,04 5:30:00,28 ,       0,4.172445, 0.68094, 1.21043
sgpcmbeC1.c1,2004,04 6:30:00,28 ,0.650048,59.18247,27.91713,15.50978
sgpcmbeC1.c1,2004,04 7:30:00,28 ,18.39654,173.5369,82.27612,35.43132
sgpcmbeC1.c1,2004,04 8:30:00,28 ,37.54292,326.5579,134.1342,63.24419
sgpcmbeC1.c1,2004,04 9:30:00,29 ,62.01657,359.1952,181.2933,82.00845
sgpcmbeC1.c1,2004,0410:30:00,29 ,54.78417,457.3893,234.3464,119.1024
sgpcmbeC1.c1,2004,0411:30:00,29 ,103.0557,519.3423,248.6002, 135.719
sgpcmbeC1.c1,2004,0412:30:00,29 ,75.86749,540.9396,244.6662,136.9823
sgpcmbeC1.c1,2004,0413:30:00,29 ,97.21532,435.6965,235.7573,118.8382
sgpcmbeC1.c1,2004,0414:30:00,29 ,47.93716,395.6796, 215.736,106.0219
sgpcmbeC1.c1,2004,0415:30:00,29 , 31.0408,350.8505,193.9855,94.70093
sgpcmbeC1.c1,2004,0416:30:00,29 ,20.31753,268.2921,150.0293,69.80321
sgpcmbeC1.c1,2004,0417:30:00,29 ,6.678839,152.0874,  85.752, 37.9331
sgpcmbeC1.c1,2004,0418:30:00,29 ,       0, 53.9278,27.13463,12.43128
sgpcmbeC1.c1,2004,0419:30:00,29 ,       0,1.753722,0.321387,0.577503
sgpcmbeC1.c1,2004,0420:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,0421:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,0422:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,0423:30:00,27 ,       0,       0,       0,       0