datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2004,07 0:30:00,30 ,       0,0.038632,0.001288,0.007053
sgpcmbeC1.c1,2004,07 1:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,07 2:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,07 3:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,07 4:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,07 5:30:00,30 ,       0,7.206303,2.966853,2.028443
sgpcmbeC1.c1,2004,07 6:30:00,30 ,0.723216,26.07779,11.59209,6.304639
sgpcmbeC1.c1,2004,07 7:30:00,30 ,0.793001, 23.2446,11.71057,5.439816
sgpcmbeC1.c1,2004,07 8:30:00,30 ,2.633072,43.02878, 15.7741,9.927833
sgpcmbeC1.c1,2004,07 9:30:00,30 , 1.32127,57.22195,18.45787,15.06765
sgpcmbeC1.c1,2004,0710:30:00,30 ,1.409283,55.71108,16.48556,16.76598
sgpcmbeC1.c1,2004,0711:30:00,31 ,1.545096,56.16319, 17.9134,18.91053
sgpcmbeC1.c1,2004,0712:30:00,31 ,0.545319,67.26442,20.82658,20.28368
sgpcmbeC1.c1,2004,0713:30:00,31 ,1.790609,64.16279,24.61957,22.81216
sgpcmbeC1.c1,2004,0714:30:00,31 , 3.93049,73.90457,28.68844,22.21507
sgpcmbeC1.c1,2004,0715:30:00,31 ,3.356047,59.32303,21.56578,17.94231
sgpcmbeC1.c1,2004,0716:30:00,31 ,1.355002,46.63758,18.32655,12.80934
sgpcmbeC1.c1,2004,0717:30:00,31 ,0.844255,32.75474,15.88038,8.145238
sgpcmbeC1.c1,2004,0718:30:00,31 ,0.439639,23.92327,12.60826,6.173494
sgpcmbeC1.c1,2004,0719:30:00,31 ,       0,10.05329,5.814372,2.930482
sgpcmbeC1.c1,2004,0720:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,0721:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,0722:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,0723:30:00,31 ,       0,       0,       0,       0