trace() seems to be broken in 2.6.1 and R-devel: Try the example from the ?debug man page:
> library(methods) > trace("plot", browser, exit=browser, signature = c("track", + "missing")) Error in getFunction(what, where = whereF) : no function "plot" found Okay, it's just an example that doesn't work. Let's try a simpler one, the first example from the ?trace man page: > trace(sum) > hist(stats::rnorm(100)) # shows about 3-4 calls to sum() > untrace(sum) No trace! In a clean session without the first error, things are fine: > trace(sum) > hist(stats::rnorm(100)) # shows about 3-4 calls to sum() trace: sum(2^(opts - 2)) trace: sum(2^(opts - 2)) trace: sum(2^(opts - 2)) trace: sum(counts) trace: sum(2^(opts - 2)) > untrace(sum) Duncan Murdoch ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel