Hi, DevelopeRs,
Consider the following simple function:
myFun <- function(){
print(log(-1))
browser()
print("Bye!")
}
With default settings (in particular, options(warn=0)), if you call this
function and then type only standard browser commands (cont, n, where Q) at
the browser prompt, you see the warning message from printing log(-1)
printed after the final "Bye!":
> myFun()
[1] NaN
Called from: myFun()
Browse[1]> c
[1] "Bye!"
Warning message:
In log(-1) : NaNs produced
However, if you type an ordinary R expression at the browser prompt, you see
the warning message after that expression's output, while still at the
browser prompt:
> myFun()
[1] NaN
Called from: myFun()
Browse[1]> print(2)
[1] 2
Warning message:
In log(-1) : NaNs produced
Browse[1]>
This looks like a bug to me, but admit that I just might not understand
what's going on. So, is it a bug?
Rich Calaway
Documentation Manager
REvolution Computing, Inc.
richcala...@revolution-computing.com
206-577-4778 x3204
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