[R] concatenate data frame

P Ehlers ehlers at math.ucalgary.ca
Wed Dec 7 20:44:52 CET 2005


I assume that 'tab' is a data frame and that, for some
unspecified reason, you want to get two subsets of the last
column of tab, overlapping one case, and coercing the final
result to a data frame. If that is correct, then

as.data.frame(c(tab_tmp, tab_tmp1))

will give you a data frame. Alternatively, check out the
'drop =' argument to '[.data.frame' and then rbind your

Peter Ehlers

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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