Hi All, I have a data frame:
Time1 Time2 1 176:46:10 41:48:06 2 171:28:57 61:19:10 3 178:25:15 34:05:35 4 74:04:20 25:01:55 5 136:11:20 37:59:32 6 138:17:17 30:22:27 7 183:04:48 29:25:02 8 179:35:01 19:29:44 > str(df) 'data.frame': 8 obs. of 2 variables: $ Time1: Factor w/ 583 levels "","00:00:01",..: 574 573 575 583 565 566 579 577 $ Time2: Factor w/ 1298 levels "00:00:00","00:00:01",..: 1292 1297 1288 1281 1290 1286 1284 1279 I would like to make calculations (adding, summing) on this data. How do I transform those factors into duration data (in format hh:mm:ss). I have already found *lubridate* package but it does not work with factors. I tried to convert as numeric, but it never works for me. How do I do that? -- View this message in context: http://r.789695.n4.nabble.com/Adding-duration-hh-mm-ss-Converting-factor-column-into-duration-class-tp4515210p4515210.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.