[BioC] RGraphviz

[Sim, Fraser]

Hi all,

I am trying to set custom arrowheads in a graphviz-based plot. It I set
to "tee" or "dot", I get the expected symbols.

However, if I use "normal", I do not get a closed arrowhead and there is
no difference between "normal" and "vee" arrowheads.

Any idea why?

Cheers,
Fraser

sessionInfo:
R version 2.8.1 (2008-12-22) 
i386-pc-mingw32 

locale:
LC_COLLATE=English_United States.1252;LC_CTYPE=English_United
States.1252;LC_MONETARY=English_United
States.1252;LC_NUMERIC=C;LC_TIME=English_United States.1252

attached base packages:
[1] grid      stats     graphics  grDevices utils     datasets  methods

[8] base     

other attached packages:
[1] Rgraphviz_1.21.7 graph_1.20.0     rcom_2.0-4       rscproxy_1.0-12 

loaded via a namespace (and not attached):
[1] cluster_1.11.12 tools_2.8.1