datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,1998,12 0:30:00,23 ,       0,0.051226,0.002227,0.010681
sgpcmbeC1.c1,1998,12 1:30:00,24 ,       0,0.026271,0.001095,0.005363
sgpcmbeC1.c1,1998,12 2:30:00,25 ,       0,0.056566,0.002263,0.011313
sgpcmbeC1.c1,1998,12 3:30:00,25 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,12 4:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,12 5:30:00,28 ,       0,0.110424,0.003944,0.020868
sgpcmbeC1.c1,1998,12 6:30:00,29 ,       0,0.453241,0.015629,0.084165
sgpcmbeC1.c1,1998,12 7:30:00,29 , 0.21535,12.60678, 4.86214,3.127641
sgpcmbeC1.c1,1998,12 8:30:00,29 ,7.263601,75.49898,40.00776,19.04006
sgpcmbeC1.c1,1998,12 9:30:00,29 ,33.27909,150.3582,75.65011, 33.9384
sgpcmbeC1.c1,1998,1210:30:00,28 ,39.29571,233.4213,106.7585,57.84058
sgpcmbeC1.c1,1998,1211:30:00,29 , 51.6017,280.9559,120.9538,73.07386
sgpcmbeC1.c1,1998,1212:30:00,28 ,37.15113,295.4553,113.4099,66.60878
sgpcmbeC1.c1,1998,1213:30:00,27 ,31.76726,  225.42,112.0224,66.09758
sgpcmbeC1.c1,1998,1214:30:00,27 ,26.15518,181.4125,87.37568,44.05864
sgpcmbeC1.c1,1998,1215:30:00,27 ,11.86042,137.0237,70.99728,33.89639
sgpcmbeC1.c1,1998,1216:30:00,28 ,6.369055,70.39572,38.52085,15.48436
sgpcmbeC1.c1,1998,1217:30:00,27 ,0.105535, 5.38239,2.702268, 1.43829
sgpcmbeC1.c1,1998,1218:30:00,27 ,       0,0.009728, 0.00036,0.001872
sgpcmbeC1.c1,1998,1219:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,1220:30:00,25 ,       0,0.128861,0.005154,0.025772
sgpcmbeC1.c1,1998,1221:30:00,26 ,       0,0.271247,0.010433,0.053196
sgpcmbeC1.c1,1998,1222:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,1223:30:00,25 ,       0,0.599347,0.023974,0.119869