datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,1998,12 0:30:00,23 ,       0,0.582612,0.025331,0.121483
sgpcmbeC1.c1,1998,12 1:30:00,24 ,       0,0.417267,0.017386,0.085174
sgpcmbeC1.c1,1998,12 2:30:00,25 ,       0,0.597514,0.023901,0.119503
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 ,       0,0.620175,0.022149,0.117202
sgpcmbeC1.c1,1998,12 6:30:00,29 ,       0,1.322725,0.045611,0.245624
sgpcmbeC1.c1,1998,12 7:30:00,29 ,0.842077,21.19129,8.796536,5.651143
sgpcmbeC1.c1,1998,12 8:30:00,29 ,4.152257,66.03518, 36.9919,19.39993
sgpcmbeC1.c1,1998,12 9:30:00,29 ,3.245442,81.26383,41.46051,18.56048
sgpcmbeC1.c1,1998,1210:30:00,28 ,5.024654,111.5111,45.47904,27.93728
sgpcmbeC1.c1,1998,1211:30:00,29 ,6.151514,127.7159,40.61767,33.76232
sgpcmbeC1.c1,1998,1212:30:00,28 , 2.38504,94.51354,27.89678,27.39073
sgpcmbeC1.c1,1998,1213:30:00,27 ,3.693925,117.5842,35.18854,30.91031
sgpcmbeC1.c1,1998,1214:30:00,27 ,2.463691,86.10066,38.12823,19.84682
sgpcmbeC1.c1,1998,1215:30:00,27 ,3.025706,76.89504,41.14233,20.43175
sgpcmbeC1.c1,1998,1216:30:00,28 , 2.75278,59.96184,36.36647,16.38934
sgpcmbeC1.c1,1998,1217:30:00,27 ,0.580947,10.45792,5.139207,2.593302
sgpcmbeC1.c1,1998,1218:30:00,27 ,       0,0.420696,0.015581,0.080963
sgpcmbeC1.c1,1998,1219:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,1220:30:00,25 ,       0,0.722385,0.028895,0.144477
sgpcmbeC1.c1,1998,1221:30:00,26 ,       0,1.183245,0.045509,0.232053
sgpcmbeC1.c1,1998,1222:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,1223:30:00,25 ,       0,1.451598,0.058064, 0.29032