Line numbers with errors and warnings?

What I mean is how do I get the R compilation or execution process to
spit out a line number with errors and warnings?

I should not have mentioned ESS, that is a distraction.
I think ESS is not a distraction here, it is the cause of the problem. 
If you source() your code, R will (by default) record line numbers.  ESS 
apparently doesn't send code to R using source().  (Or perhaps it does, 
and you aren't looking in the right place for it?)

For example, in Windows, if I put this code into the clipboard:

f <- function() {
   stop("this is the error")
}

g <- function() {
   f()
}

g()

then run source("clipboard") followed by traceback(), this is what I see:

 > source("clipboard")
Error in f() (from clipboard#2) : this is the error
 > traceback()
7: stop("this is the error") at clipboard#2
6: f() at clipboard#6
5: g() at clipboard#9
4: eval(expr, envir, enclos)
3: eval(ei, envir)
2: withVisible(eval(ei, envir))
1: source("clipboard")

You can ignore entries 1 to 4; they are part of source().  Entries 5, 6, 
and 7 each tell the line of the script where they were parsed.

Duncan Murdoch
option(error=browser) is a help.  But it still does not say what piece
of code caused the error.

This is costing me a lot of time chasing down errors in mine and others
code...

Worik

On Sat, Dec 1, 2012 at 1:47 PM, Duncan Murdoch <murdoch.duncan at gmail.com
<mailto:murdoch.duncan at gmail.com>> wrote:

    On 12-11-30 7:15 PM, Worik R wrote:

        How?

        This is a script I am running under ess on Emacs

    I've never used ESS.  You'll need to ask someone on the ESS list.

    Duncan Murdoch

        (Useful information optuion(error=recover)

        cheers
        Worik

        On Sat, Dec 1, 2012 at 12:34 PM, Duncan Murdoch
        <murdoch.duncan at gmail.com <mailto:murdoch.duncan at gmail.com>
        <mailto:murdoch.duncan at gmail.__com
        <mailto:murdoch.duncan at gmail.com>>> wrote:

             On 12-11-30 4:22 PM, Worik R wrote:

                 Is it possible to get a line number with an error report?

             Yes, if the error occurs in code that has line number
        information.
             You get line number info by default if you use source().
          If the
             error is deeply buried in code that doesn't have the info
        (as it may
             be in your case), then the suggestions to use
        options(error=recover)
             will offer you a stack trace that shows you which high
        level code
             called the function reporting the problem.

             Duncan Murdoch

                 I have a long script and an error:

                 Error in `[.xts`(x, xsubset) : subscript out of bounds

                 It would be very helpful, and save a lot of time, if
        there was some
                 indication in the error message which line the error was.

                 I can find it using binary search but that is a painful
        process.

                 cheers
                 Worik

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Line numbers with errors and warnings?

Thread (17 messages)