datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,1999,01 0:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,01 1:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,01 2:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,01 3:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,01 4:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,01 5:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,01 6:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,01 7:30:00,31 ,       0,2.268713,0.376865,0.614587
sgpcmbeC1.c1,1999,01 8:30:00,31 ,0.046474,83.70995,22.91882,28.77388
sgpcmbeC1.c1,1999,01 9:30:00,31 ,0.145786,244.9768,  74.554,90.60933
sgpcmbeC1.c1,1999,0110:30:00,31 ,0.329193,384.1772,121.4187,144.6756
sgpcmbeC1.c1,1999,0111:30:00,31 ,0.034977,476.8577,140.7727,172.9424
sgpcmbeC1.c1,1999,0112:30:00,31 ,0.204611,497.9451,202.2911,186.4965
sgpcmbeC1.c1,1999,0113:30:00,31 ,0.059237,484.0687, 205.355,192.9297
sgpcmbeC1.c1,1999,0114:30:00,31 ,0.019707,425.8026,174.6291,162.6353
sgpcmbeC1.c1,1999,0115:30:00,31 ,0.028622,302.7175,122.4784,116.3723
sgpcmbeC1.c1,1999,0116:30:00,31 ,0.018387,145.1881,49.42886,48.34539
sgpcmbeC1.c1,1999,0117:30:00,31 ,       0,20.04582,3.126438,4.629259
sgpcmbeC1.c1,1999,0118:30:00,31 ,       0,0.002695,0.000087,0.000484
sgpcmbeC1.c1,1999,0119:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,0120:30:00,31 ,       0,0.015815, 0.00051, 0.00284
sgpcmbeC1.c1,1999,0121:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,0122:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,0123:30:00,28 ,       0,       0,       0,       0