How to set default browser to Internet Explorer in R?
A solution could be to create a file named .Rprofile in your home directory and put the following line:
options(browser="path/to/IE")Of course, you have to replace the path/to/IE part to the actual path to the IE executable (could be something like C:\\Program Files\\Internet Explorer\\iexplore.exe\).
Restart R and try for instance browseURL("www.google.com") to see if it has taken effect.