GraphViz: Windows PATH not set with new installer, issue when calling from R

Question

In an R library, I am using the dot program (from GraphViz) to produce some graphics (usually in png format). dot is a usual executable and I execute i

Answer 1

We decided not to set PATH during installation. We had a lot of trouble doing this in a portable way, given our limited knowledge of Windows in its many forms. The huge downside of getting it wrong is that you trash some poor "not computer expert"'s PATH and they can't recover. We made a note to this effect on the Windows download page for Graphviz. I agree about setting .Rprofile. At least you limit the damage if something goes wrong.