Question

I’m debugging R code with browser().
The function pauses the execution of the current R script and allows for inspection.
Is it possible to enable/disable the debug mode on the fly, during the execution?
With large scripts it would be very handy.

Thanks

Answer 1

Your question prompted me to read ?browser. The documentation says you can use the expr= argument to browser to create (the illusion) of conditional debugging. That, combined with a global option should give you what you want.

foo <- function(x) {
  browser(expr=isTRUE(getOption("myDebug")))
  mean(x)
}
foo(1:10)
options(myDebug=TRUE)
foo(1:10)  # invokes browser