concatenate data frame
Having no idea what the object "no" is, or what the object "off_set"
is, it is difficult to understand what you are trying to do. Perhaps
if you substituted simple numbers in the example, such as
tab[ 1:5, 15]
it would be easier to understand.
Perhaps what you really want is cbind() or rbind(), not c().
Probably, it would be better to use ncol(tab) rather than length(tab).
-Don
At 6:38 PM +0100 12/7/05, herodote at oreka.com wrote:
hi all Here is a small part of my code: tab_tmp<-tab[1:(no[off_set[i-1]+1]+(no[off_set[i]+1]-no[off_set[i-1]+1])),length(tab)]; tab_tmp1<-tab[(no[off_set[i-1]+1]+(no[off_set[i]+1]-no[off_set[i-1]+1])):length(TotalFillTimeHours),length(tab)]; tab<-c(tab_tmp,tab_tmp1); attach(tab); Here is the output: Error in attach(tab) : attach only works for lists and data frames Execution halted How do i concatenate them in order to keep the data frame structure? thks for your help guillaume
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-------------------------------------- Don MacQueen Environmental Protection Department Lawrence Livermore National Laboratory Livermore, CA, USA