What are you talking about? R has some of the most robust debugging tools I have encountered. You should look into the functions: browser, traceback, recover, t

What are you talking about? R has some of the most robust debugging tools I have encountered. You should look into the functions: browser, traceback, recover, trace, dump.frames, debug, debugonce, `environment<-`. What other language allows you to insert breakpoints (or arbitrary code) in the middle of a function's body without even having to re-paste the source code into the console? If you're unsatisfied with R's debugging tools, you are probably not familiar with them: http://adv-r.had.co.nz/Exceptions-Debugging.html http://adv-r.had.co.nz/Exceptions-Debugging.html