[R] finding a function or a line while debugging?

[Duncan Murdoch]

On 30/07/2010 8:04 AM, Raghu wrote:
> guRus
>
> Is there a way by which I can search for a particular function or a
> particular line of code within the maze of all the R codes that are
> interlinked? Say for instance I am running a code using quantstrat package
> and on a particular line I get the error saying x is missing in is.array(x).
> I want to figure out where is.array is in all the codes that my code refers
> to? How do I do this? Is there like a grep or search function that can say
> tell me that 'here is the function inside which is.array(X) is being called'
> etc?
>
> out<-try(applyStrategy(strategy=stratSMA5D , portfolios=portfolio.st))
> Error in is.array(x) : 'x' is missing

?traceback

For more info, see the somewhat outdated 
http://www.stats.uwo.ca/faculty/murdoch/software/debuggingR pages.

Duncan Murdoch