Data files test1, ...2, ...3, ...4 respectively. time1,dataset1 01:01:00,0.73512097 01:01:30,0.34860813 01:02:00,0.61306418 01:02:30,0.01495898 01:03:00,0.27035612 01:03:30,0.69513898 01:04:00,0.46451758 01:04:30,0.61672569 01:05:00,0.82496122 01:05:30,0.34766154 01:06:00,0.69618714 01:06:30,0.39035214 01:07:00,0.01680143 01:07:30,0.28576967 01:08:00,0.01205416 01:08:30,0.89637254 01:09:00,0.63147653 01:09:30,0.01522139 01:10:00,0.27661960 01:10:30,0.50974124 01:11:00,0.68141977 01:11:30,0.90725854 01:12:00,0.83823443 01:12:30,0.53360241 01:13:00,0.17769196 01:13:30,0.83438616 01:14:00,0.67248807 01:14:30,0.09991933 01:15:00,0.03334966 01:15:30,0.93292355 01:16:00,0.15990837 01:16:30,0.05354050 01:17:00,0.55281203 01:17:30,0.37845690 01:18:00,0.89051365 01:18:30,0.16674292 01:19:00,0.85458626 01:19:30,0.19278550 01:20:00,0.73240405 01:20:30,0.16417524 01:21:00,0.73878212 01:21:30,0.51790118 01:22:00,0.83076438 01:22:30,0.47555504 01:23:00,0.02108640 01:23:30,0.82911053 01:24:00,0.95555646 01:24:30,0.14493657 01:25:00,0.84422332 01:25:30,0.41589974 01:26:00,0.67606367 01:26:30,0.00606434 01:27:00,0.59951991 01:27:30,0.43949260 01:28:00,0.66297385 01:28:30,0.33131298 01:29:00,0.06102041 01:29:30,0.84722118 01:30:00,0.46841491 01:30:30,0.34200755 01:31:00,0.87386578 01:31:30,0.70737403 01:32:00,0.23978781 01:32:30,0.11787278 01:33:00,0.14679814 01:33:30,0.65217063 01:34:00,0.81355908 01:34:30,0.31583482 01:35:00,0.92167666 01:35:30,0.55931271 01:36:00,0.13641271 01:36:30,0.35048575 01:37:00,0.17243584 01:37:30,0.93645686 01:38:00,0.85356548 01:38:30,0.61399352 01:39:00,0.05910707 01:39:30,0.01721605 01:40:00,0.94845557 01:40:30,0.48117810 01:41:00,0.34752402 01:41:30,0.59295472 01:42:00,0.64267429 01:42:30,0.57859933 01:43:00,0.00201441 01:43:30,0.32530995 01:44:00,0.25474645 01:44:30,0.93187534 01:45:00,0.99361033 01:45:30,0.16591641
time2,dataset2 01:01:01,0.17558467 01:01:42,0.23806514 01:02:23,0.75867726 01:03:06,0.73502357 01:03:50,0.94018206 01:04:35,0.61882643 01:05:21,0.68417492 01:06:08,0.05744461 01:06:55,0.33344394 01:07:44,0.68752593 01:08:33,0.17270469 01:09:23,0.81522124 01:10:03,0.68304352 01:10:43,0.38774082 01:11:23,0.84176890 01:12:04,0.09344446 01:12:44,0.13431965 01:13:25,0.92210721 01:14:06,0.33630635 01:14:47,0.56690294 01:15:29,0.09870816 01:16:11,0.77864105 01:16:53,0.61803441 01:17:35,0.09133728 01:18:17,0.08925487 01:19:00,0.89271117 01:19:42,0.56605742 01:20:25,0.98520534 01:21:08,0.66104843 01:21:51,0.96948589 01:22:34,0.05692690 01:23:17,0.71887456 01:24:00,0.14903741 01:24:43,0.86569445 01:25:26,0.27923513 01:26:09,0.98365033 01:26:53,0.08308399 01:27:36,0.87071027 01:28:19,0.26475705 01:29:03,0.76409811 01:29:47,0.59563256 01:30:31,0.23995054 01:31:14,0.00951054 01:31:59,0.21367270 time1,dataset1 01:02:30,0.01495898 01:03:00,0.27035612 01:03:30,0.69513898 01:04:00,0.46451758 01:04:30,0.61672569 01:05:00,0.82496122 01:05:30,0.34766154 01:06:00,0.69618714 01:06:30,0.39035214 01:07:00,0.01680143 01:07:30,0.28576967 01:08:00,0.01205416 01:08:30,0.89637254 01:09:00,0.63147653 01:09:30,0.01522139 01:10:00,0.27661960 01:10:30,0.50974124 01:11:00,0.68141977 01:11:30,0.90725854 01:12:00,0.83823443 01:12:30,0.53360241 01:13:00,0.17769196 01:13:30,0.83438616 01:14:00,0.67248807 01:14:30,0.09991933 01:15:00,0.03334966 01:15:30,0.93292355 01:16:00,0.15990837 01:16:30,0.05354050 01:17:00,0.55281203 01:17:30,0.37845690 01:18:00,0.89051365 01:18:30,0.16674292 01:19:00,0.85458626 01:19:30,0.19278550 01:20:00,0.73240405 01:20:30,0.16417524 01:21:00,0.73878212 01:21:30,0.51790118 01:22:00,0.83076438 01:22:30,0.47555504 01:23:00,0.02108640 01:23:30,0.82911053 01:24:00,0.95555646 01:24:30,0.14493657 01:25:00,0.84422332 01:25:30,0.41589974 01:26:00,0.67606367 01:26:30,0.00606434 01:27:00,0.59951991 01:27:30,0.43949260 01:28:00,0.66297385 01:28:30,0.33131298 01:29:00,0.06102041 01:29:30,0.84722118 01:30:00,0.46841491 01:30:30,0.34200755 01:31:00,0.87386578 01:31:30,0.70737403 01:32:00,0.23978781 01:32:30,0.11787278 01:33:00,0.14679814 01:33:30,0.65217063 01:34:00,0.81355908 01:34:30,0.31583482 01:35:00,0.92167666 01:35:30,0.55931271 01:36:00,0.13641271 01:36:30,0.35048575 01:37:00,0.17243584 01:37:30,0.93645686 01:38:00,0.85356548 01:38:30,0.61399352 01:39:00,0.05910707 01:39:30,0.01721605 01:40:00,0.94845557 01:40:30,0.48117810 01:41:00,0.34752402 01:41:30,0.59295472 01:42:00,0.64267429 01:42:30,0.57859933 01:43:00,0.00201441 01:43:30,0.32530995 01:44:00,0.25474645 01:44:30,0.93187534 01:45:00,0.99361033 01:45:30,0.16591641 time2,dataset2 01:03:06,0.73502357 01:03:50,0.94018206 01:04:35,0.61882643 01:05:21,0.68417492 01:06:08,0.05744461 01:06:55,0.33344394 01:07:44,0.68752593 01:08:33,0.17270469 01:09:23,0.81522124 01:10:03,0.68304352 01:10:43,0.38774082 01:11:23,0.84176890 01:12:04,0.09344446 01:12:44,0.13431965 01:13:25,0.92210721 01:14:06,0.33630635 01:14:47,0.56690294 01:15:29,0.09870816 01:16:11,0.77864105 01:16:53,0.61803441 01:17:35,0.09133728 01:18:17,0.08925487 01:19:00,0.89271117 01:19:42,0.56605742 01:20:25,0.98520534 01:21:08,0.66104843 01:21:51,0.96948589 01:22:34,0.05692690 01:23:17,0.71887456 01:24:00,0.14903741 01:24:43,0.86569445 01:25:26,0.27923513 01:26:09,0.98365033 01:26:53,0.08308399 01:27:36,0.87071027 01:28:19,0.26475705 01:29:03,0.76409811 01:29:47,0.59563256 01:30:31,0.23995054 01:31:14,0.00951054 01:31:59,0.21367270 ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.