datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2007,01 0:30:00,31 ,       0, 566.508, 47.9457,117.2136
sgpcmbeC1.c1,2007,01 1:30:00,31 ,       0,451.6153,48.15133,104.4555
sgpcmbeC1.c1,2007,01 2:30:00,31 ,       0,535.0859,46.35017,107.5646
sgpcmbeC1.c1,2007,01 3:30:00,31 ,       0,532.5715, 53.5198,115.1628
sgpcmbeC1.c1,2007,01 4:30:00,31 ,       0,473.9366,46.68331,104.7576
sgpcmbeC1.c1,2007,01 5:30:00,31 ,       0, 393.148,58.22592,111.1274
sgpcmbeC1.c1,2007,01 6:30:00,31 ,       0,426.7339,69.80017,133.7593
sgpcmbeC1.c1,2007,01 7:30:00,31 ,0.002776,568.9421,62.39315,128.8216
sgpcmbeC1.c1,2007,01 8:30:00,31 ,       0, 543.623,66.29421, 138.702
sgpcmbeC1.c1,2007,01 9:30:00,31 ,       0,467.7651, 62.6295, 124.545
sgpcmbeC1.c1,2007,0110:30:00,31 ,       0,477.3604, 68.3222,137.1417
sgpcmbeC1.c1,2007,0111:30:00,31 ,0.001637,660.6379,76.61913,169.5987
sgpcmbeC1.c1,2007,0112:30:00,31 ,0.013862,927.9828,116.1216,  256.05
sgpcmbeC1.c1,2007,0113:30:00,31 ,       0,454.0889,65.68353, 124.746
sgpcmbeC1.c1,2007,0114:30:00,31 ,0.016064,312.8138,47.55948,86.69518
sgpcmbeC1.c1,2007,0115:30:00,31 ,0.218948,400.9553,52.49691,99.52649
sgpcmbeC1.c1,2007,0116:30:00,31 ,0.056897, 830.112,93.96416,208.9675
sgpcmbeC1.c1,2007,0117:30:00,31 ,0.387662,1084.986,  83.071,216.4686
sgpcmbeC1.c1,2007,0118:30:00,30 ,0.042567,1030.366,63.92808,191.5418
sgpcmbeC1.c1,2007,0119:30:00,30 , 0.03453, 958.012,61.64781,179.7773
sgpcmbeC1.c1,2007,0120:30:00,30 ,0.012333,925.3937,58.43137,172.8955
sgpcmbeC1.c1,2007,0121:30:00,30 ,0.048085,1080.137,62.95451,197.8008
sgpcmbeC1.c1,2007,0122:30:00,31 ,0.005789,807.7505,59.03069,152.2851
sgpcmbeC1.c1,2007,0123:30:00,31 ,0.004137,806.9969,57.49392,154.4975