Dear experts,
I am trying to understand why is it that when I paste (into the R console)
the following code to select an option from a list:
require(tcltk)
tt<-tktoplevel()
tl<-tklistbox(tt,height=ntx,selectmode="single",background="white")
tkgrid(tklabel(tt,text="Select the legend of" ))
tkgrid(tl)
treatments<<-levels.tx
for(i in (1:ntx))
{
tkinsert(tl,"end",treatments[i])
}
OnOK<-function()
{
tx.choice1<<-treatments[as.integer(tkcurselection(tl))+1]
tkdestroy(tt)
}
OK.but<-tkbutton(tt,text=" OK ", command=OnOK)
tkgrid(OK.but)
tx.choice1
the console can't find tx.choice1, but if I type tx.choice1 directly into
the console, it returns the value I selected from the list.
I am running R 2.7.1, OS: linnux, I run R within emacs.
Thank you very much for you help,
Judith
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