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
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