About Tcl/Tk after command in R

Dear R-helpers,
I have a problem with the tcl "after" instruction. When I send:

library(tcltk)

Loading Tcl/Tk interface ... done

tcl("after",1000,cat("try tcl after\n"))

try tcl after
<Tcl>

the tcl command works fine. Similarly, the tcl command:

tcl("after",1000,plot(rnorm(100)))

<Tcl>

works fine. But, if I send the command:

tcl("after",1000,10^2)

<Tcl> after#0

appears a popup window which reports:

Error: invalid command name ?100?

Why?



Davide Massidda

Universit? di Padova
Dipartimento di Psicologia Generale
Via Venezia, 8 - 35131 Padova - Italy

QPLab http://qplab.psy.unipd.it/
tel. +39 049 8276905