datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,1999,03 0:30:00,29 ,       0,0.525995,0.018138,0.097675
sgpcmbeC1.c1,1999,03 1:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,03 2:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,03 3:30:00,30 ,       0,0.112686,0.003756,0.020574
sgpcmbeC1.c1,1999,03 4:30:00,29 ,       0,0.418319,0.014425, 0.07768
sgpcmbeC1.c1,1999,03 5:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,03 6:30:00,29 ,       0,18.41883,5.319284,  5.3131
sgpcmbeC1.c1,1999,03 7:30:00,29 ,1.830737,51.24591,18.38329,11.54002
sgpcmbeC1.c1,1999,03 8:30:00,29 ,2.026109,69.41999,22.03813,16.69959
sgpcmbeC1.c1,1999,03 9:30:00,29 ,2.492683,107.0208,32.41826, 30.3022
sgpcmbeC1.c1,1999,0310:30:00,29 ,2.128668,84.02378, 34.5406,27.53955
sgpcmbeC1.c1,1999,0311:30:00,29 ,0.996877, 148.995,36.13173,34.17666
sgpcmbeC1.c1,1999,0312:30:00,29 ,1.012667,105.6614,36.57017,30.72886
sgpcmbeC1.c1,1999,0313:30:00,30 ,0.944658,134.7724,43.03427,35.06686
sgpcmbeC1.c1,1999,0314:30:00,30 ,1.759542,122.3456, 32.3974,29.97945
sgpcmbeC1.c1,1999,0315:30:00,30 ,0.991211,87.38348,28.43277,23.25295
sgpcmbeC1.c1,1999,0316:30:00,30 ,2.284878, 50.2501,19.02309, 14.7431
sgpcmbeC1.c1,1999,0317:30:00,30 , 3.72668,50.10569,17.54045,11.23106
sgpcmbeC1.c1,1999,0318:30:00,30 ,1.294502,21.50564,10.30445,5.494239
sgpcmbeC1.c1,1999,0319:30:00,29 ,       0,0.735147,0.036847, 0.14787
sgpcmbeC1.c1,1999,0320:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,0321:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,0322:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,0323:30:00,29 ,       0,       0,       0,       0