Jim, Thanks.
It wasn't sure if merely overriding the options function by placing one in the global environment would guarantee it would be the one actually called. In any case, I didn't know how to identify the caller. This is quite helpful and looks promising. I'll give it a try. DAV -----Original Message----- From: jim holtman [mailto:jholt...@gmail.com] Sent: Monday, July 16, 2012 9:59 PM To: David A Vavra Cc: r-help@r-project.org Subject: Re: [R] Trapping option settings Here is one way by redefining 'options' so you can check for 'width' and then call the 'options' in 'base': > options <- # define 'options' in Global + function(...) + { + args <- list(...) # get arguments + if ('width' %in% names(args)){ # see if 'width' is in them + .caller <- sys.calls() # get where called from + if (length(.caller) == 1) # called from command line + .caller <- "Rgui" + else .caller <- as.character(.caller[[length(.caller) - 1]])[1] + cat("width being changed:", args[['width']], "Called from", .caller, '\n') + } + base::options(...) # call the real options + } > > > options(width = 123) # test at command line width being changed: 123 Called from Rgui > f.myfunc <- function() options(width = 456) # within a function > f.myfunc() width being changed: 456 Called from f.myfunc > On Mon, Jul 16, 2012 at 9:01 PM, David A Vavra <dava...@verizon.net> wrote: > Something has been changing the setting the width option to 10000 and not > resetting it. It does this intermittently. What I would like to do is trap > changing the setting so I can determine where the change is occurring and > hopefully fix it. > > Is there any easy way to do this? > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. -- Jim Holtman Data Munger Guru What is the problem that you are trying to solve? Tell me what you want to do, not how you want to do it. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
