[R] embed image in R-tcltk canvas

[Peter Dalgaard BSA]

jonathan_li at agilent.com writes:

> Hi,
> 
> I think that R-tcltk doesn't have the capacity to display an image stored in
> memory on a tkcanvas object, am I right? 
> I have digged around everything I can find from Peter Dalgaard and tcltk
> references and drew my conclusion. 
> 
> Can you, Peter, or some other gurus on the list, give us a pointer or two on
> how to proceed to solve this problem? I am afraid that it may involve
> writing C extensions for tcltk. Any pointer or even just hunch on how to
> solve the problem would be appreciated!

There's not all that much support for that yet, and I only know how to
do it using an external file (at least efficiently), but try stuff
like:

x <- tkcmd("image", "create", "photo",
           file="/usr/lib/tk8.3/demos/images/teapot.ppm")
tkpack(canv<-tkcanvas(tt<-tktoplevel())) 
tkcreate(canv, "image", 50,50, image=x)


-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907
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