installing Rgraphviz in Windows, one type of hell

[gusl]

Today I just struggled for several hours with my Windows path. I played around with quotes escape characters, and all sorts of red herrings. Lesson of the day: USE NO SPACES AT ALL between items. That simple! (Is this how my Python broke a while ago?)

My current approach to installing Rgraphviz is to build from source.

I couldn't escape the mysterious error message. I tried 4 versions of graphviz, but it's unclear whether Rgraphviz knew the path for any of them.


First I would try:

source("http://bioconductor.org/biocLite.R")
biocLite("Rgraphviz")

which seems to work fine.


But:
> library("Rgraphviz")

invariably led to:

Error in inDL(x, as.logical(local), as.logical(now), ...) :
unable to load shared library
'c:/PROGRA~1/R/R-2.9.0/library/Rgraphviz/libs/Rgraphviz.dll':
LoadLibrary failure: The specified module could not be found.

Error: package/namespace load failed for 'Rgraphviz'