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
Guillaume, 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 pieces. 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 > > ______________________________________________ > R-help at stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
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
>
>______________________________________________
>R-help at stat.math.ethz.ch mailing list
>https://stat.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html
--
--------------------------------------
Don MacQueen
Environmental Protection Department
Lawrence Livermore National Laboratory
Livermore, CA, USA