datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2005,01 0:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,01 1:30:00,31 ,       0,0.057623,0.001859,0.010349
sgpcmbeC1.c1,2005,01 2:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,01 3:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,01 4:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,01 5:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,01 6:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,01 7:30:00,31 ,       0,4.449991,1.083196,1.157797
sgpcmbeC1.c1,2005,01 8:30:00,30 ,1.954175,37.61747, 18.0255,12.47349
sgpcmbeC1.c1,2005,01 9:30:00,31 ,1.695265,93.68276,39.01455,27.70757
sgpcmbeC1.c1,2005,0110:30:00,31 ,5.763146,131.6667,57.59372,37.13139
sgpcmbeC1.c1,2005,0111:30:00,31 ,6.048497, 147.512,71.45657,41.19769
sgpcmbeC1.c1,2005,0112:30:00,31 ,6.259196, 322.909,81.15115,60.59698
sgpcmbeC1.c1,2005,0113:30:00,31 ,4.925798,197.4214,74.49524,46.30714
sgpcmbeC1.c1,2005,0114:30:00,31 ,3.215792,142.1236,60.56234, 40.0913
sgpcmbeC1.c1,2005,0115:30:00,31 , 2.79535, 144.102,45.56849, 34.1768
sgpcmbeC1.c1,2005,0116:30:00,30 ,  2.6971,63.63601,23.69152,17.22243
sgpcmbeC1.c1,2005,0117:30:00,31 ,       0,16.13595,4.971196,4.892565
sgpcmbeC1.c1,2005,0118:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,0119:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,0120:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,0121:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,0122:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,0123:30:00,31 ,       0,       0,       0,       0