rbind/timestamp problem
try this:
sensitivity=rbind(sensitivity,data.frame(mtype=2,cdate=as.POSIXct(Sys.time(), origin="1970-01-01"))) sensitivity
mtype cdate 1 1 2013-12-10 09:35:53 2 2 2013-12-10 09:37:02 The 'c' function is coercing to numeric. If you want to 'rbind' rows to a dataframe, then make sure you use a dataframe. Jim Holtman Data Munger Guru What is the problem that you are trying to solve? Tell me what you want to do, not how you want to do it. On Tue, Dec 10, 2013 at 8:55 AM, Georg H?rmann
<ghoermann at hydrology.uni-kiel.de> wrote:
Hello world, I am stuck somehow... I am trying to add a timestamp to a sensitivity matrix: #this code works: sensitivity=data.frame(mtype=1,cdate=2) sensitivity=rbind(sensitivity,c(mtype=2,cdate=2)) # this code does not work - no idea why sensitivity=data.frame(mtype=1,cdate=as.POSIXct(Sys.time(), origin="1970-01-01")) sensitivity=rbind(sensitivity,c(mtype=2,cdate=as.POSIXct(Sys.time(), origin="1970-01-01"))) Error message: "Error in as.POSIXct.numeric(value) : 'origin' must be supplied" Any hints why the second part does not work? Greetings, Georg -- Georg Hoermann, Dep. of Hydrology, Ecology, Kiel University, Germany +49/431/2190916, mo: +49/176/64335754, icq:348340729, skype: ghoermann
______________________________________________ R-help at 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.