datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2007,02 0:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,02 1:30:00,28 ,       0,0.036614,0.001308,0.006919
sgpcmbeC1.c1,2007,02 2:30:00,28 ,       0,0.027841,0.000994,0.005261
sgpcmbeC1.c1,2007,02 3:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,02 4:30:00,28 ,       0,   0.029,0.001036,0.005481
sgpcmbeC1.c1,2007,02 5:30:00,28 ,       0,  0.1739,0.015633,0.046448
sgpcmbeC1.c1,2007,02 6:30:00,28 ,       0,0.179863,0.010474,0.039505
sgpcmbeC1.c1,2007,02 7:30:00,28 ,0.177882,10.65096,5.291436, 3.55828
sgpcmbeC1.c1,2007,02 8:30:00,28 ,0.799363,18.55775,10.26717,5.468017
sgpcmbeC1.c1,2007,02 9:30:00,28 ,0.243959,41.87292,12.79086,9.218662
sgpcmbeC1.c1,2007,0210:30:00,28 ,0.547589,40.45725,13.14882,12.55758
sgpcmbeC1.c1,2007,0211:30:00,28 , 1.83495,70.18945,8.280985, 13.0957
sgpcmbeC1.c1,2007,0212:30:00,28 ,0.194748,36.53317,5.742281,8.147527
sgpcmbeC1.c1,2007,0213:30:00,28 ,2.277612,31.84641,8.435719,8.084061
sgpcmbeC1.c1,2007,0214:30:00,28 ,2.202672,37.41133,9.751694,7.980173
sgpcmbeC1.c1,2007,0215:30:00,28 ,2.226412,36.91044, 11.3996,8.420275
sgpcmbeC1.c1,2007,0216:30:00,28 ,2.681838,28.25254,10.91166,5.490082
sgpcmbeC1.c1,2007,0217:30:00,28 ,0.459162,14.39919,7.173952, 4.51518
sgpcmbeC1.c1,2007,0218:30:00,28 ,       0,2.117593,0.379534,0.668072
sgpcmbeC1.c1,2007,0219:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,0220:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,0221:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,0222:30:00,28 ,       0,0.009151,0.000327,0.001729
sgpcmbeC1.c1,2007,0223:30:00,28 ,       0,       0,       0,       0