datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2005,04 0:30:00,30 ,       0,1.404927,0.298701, 0.44024
sgpcmbeC1.c1,2005,04 1:30:00,30 ,       0,1.427249, 0.27431,0.462243
sgpcmbeC1.c1,2005,04 2:30:00,30 ,       0, 1.65804,0.251561,0.481677
sgpcmbeC1.c1,2005,04 3:30:00,30 ,       0,1.150405,0.167814,0.384367
sgpcmbeC1.c1,2005,04 4:30:00,30 ,       0,1.438699,0.128033,0.328361
sgpcmbeC1.c1,2005,04 5:30:00,30 ,       0,7.541899,2.386545,2.302337
sgpcmbeC1.c1,2005,04 6:30:00,30 ,3.062083,27.98153,15.29232,  6.2523
sgpcmbeC1.c1,2005,04 7:30:00,30 ,4.511286,42.01991,16.94254,11.26882
sgpcmbeC1.c1,2005,04 8:30:00,30 ,1.919616,101.5783,30.44672,29.28528
sgpcmbeC1.c1,2005,04 9:30:00,30 ,0.772759,131.0583,33.96962,33.36214
sgpcmbeC1.c1,2005,0410:30:00,30 ,0.845005,133.2258,38.30359,39.40392
sgpcmbeC1.c1,2005,0411:30:00,30 ,0.714124,138.6158,46.08042,44.76359
sgpcmbeC1.c1,2005,0412:30:00,30 ,0.317765,117.3734,49.07076,42.43033
sgpcmbeC1.c1,2005,0413:30:00,30 ,0.474995,108.2837,41.92655,34.15919
sgpcmbeC1.c1,2005,0414:30:00,30 ,0.901721,114.7833,38.38093,35.84204
sgpcmbeC1.c1,2005,0415:30:00,30 ,1.415356,128.2413,34.75234,33.07596
sgpcmbeC1.c1,2005,0416:30:00,30 ,2.421683,121.8626,37.59096,35.54233
sgpcmbeC1.c1,2005,0417:30:00,30 ,4.231382,76.39511,21.65932,16.82391
sgpcmbeC1.c1,2005,0418:30:00,30 ,5.717977,51.01674,18.77586,9.312361
sgpcmbeC1.c1,2005,0419:30:00,30 ,       0,7.554361, 2.56473,1.936931
sgpcmbeC1.c1,2005,0420:30:00,30 ,       0,1.579495,0.340305,0.595474
sgpcmbeC1.c1,2005,0421:30:00,30 ,       0,1.502514,0.392259,0.598683
sgpcmbeC1.c1,2005,0422:30:00,30 ,       0, 1.43129, 0.37912,0.537996
sgpcmbeC1.c1,2005,0423:30:00,30 ,       0,1.482362,0.246038, 0.45344