[R] Dynamically changing point's symbol in grid.points...

[M.Kondrin]

...does not work. Do 
k<-grid.points(c(0.1,0.2,0.3),c(0.1,0.2,0.3),pch=3,vp=viewport()) 
(symbol - +). Try to change it grid.edit(k, pch=1) (symbol - open 
circle). Get filled squares. pch from 0 to 25 produces the same output. 
pch="x" - works OK. Device - x11(), gtk() (from GtkDevice). R -1.6.1