Thank you,
now it works. I would never have never found the source of the problem.
I am trying
to build a data frame with results from a sensitivity analysis
for a model. I use rbind because the number of rows is
unkown and i use the timestamp as a hint for the students
that they do not analyse
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 datafram
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