Re: [Rd] Tips for debugging: R CMD check examples

From: hadley wickham <>
Date: Wed, 30 Jun 2010 08:32:58 -0500

> R CMD check produces a foo-Ex.R file where foo is the package name. You
> could start by sourcing that file in R --vanilla and see where it fails
> and also use standard debugging tools in R from there (i.e. drop into a
> debugger on error).

I knew about the foo-Ex.R file, but unfortunately running that produced no errors. I ended up resorting to inserting print statements every few lines to narrow down the exact location of the problem, which revealed that my code assumed options(keep.source = TRUE) but during R CMD check, options(keep.source = FALSE).

Hopefully this type of problem will be easier to sort out with the new pure R R CMD check in 2.11.


Assistant Professor / Dobelman Family Junior Chair
Department of Statistics / Rice University

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