datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2001,12 0:30:00,18 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,12 1:30:00,17 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,12 2:30:00,19 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,12 3:30:00,22 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,12 4:30:00,23 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,12 5:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,12 6:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,12 7:30:00,31 ,       0,20.71306,8.907594,5.374989
sgpcmbeC1.c1,2001,12 8:30:00,31 ,3.249779,75.25702,40.55296,19.49047
sgpcmbeC1.c1,2001,12 9:30:00,31 ,3.958952,112.0939,50.23611,26.61189
sgpcmbeC1.c1,2001,1210:30:00,31 ,6.189621,121.0063,52.70528,32.00462
sgpcmbeC1.c1,2001,1211:30:00,31 ,5.588951,129.2878,39.61016,31.32731
sgpcmbeC1.c1,2001,1212:30:00,31 ,2.248777,82.81964,27.62716, 27.6872
sgpcmbeC1.c1,2001,1213:30:00,30 ,4.502414,142.2606,36.54093,31.11669
sgpcmbeC1.c1,2001,1214:30:00,31 ,7.069759,95.51767,41.51572,20.93244
sgpcmbeC1.c1,2001,1215:30:00,31 ,3.588463,108.5839, 49.6765,26.78571
sgpcmbeC1.c1,2001,1216:30:00,31 ,4.202244,76.77406,39.54324,16.76738
sgpcmbeC1.c1,2001,1217:30:00,31 ,       0,9.920495,5.400453,2.628514
sgpcmbeC1.c1,2001,1218:30:00,30 ,       0,0.564014,  0.0188,0.102974
sgpcmbeC1.c1,2001,1219:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,1220:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,1221:30:00,23 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,1222:30:00,22 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,1223:30:00,18 ,       0,       0,       0,       0