Can you turn a string into a (working) symbol?
On Wed, Nov 28, 2012 at 3:06 AM, andrewH <ahoerner at rprogress.org> wrote:
Dear Michael ? This is _very_ interesting and I want to play around with the functions you suggest. I had no idea it was so easy to define assignment operators. However, one question: even after reading the ?get? documentation and doing a bunch of mousing around for the expressions ?pos? and ?the search path?, I am not sure what function the numeral 1 in these expression serves. Why do I want to look in the global environment rather than the current environment? I also can not find anything that explains what the default ?pos = -1? does. Thanks for responding! andrewH
Hi Andrew, Including context for those of us who don't read via Nabble is always much appreciated. I don't have time today to hit this with a hammer till it works, but IIRC pos = -1 means "current evaluation frame". See, e.g., http://stackoverflow.com/questions/12492226/r-environments-and-function-call-stacks http://stackoverflow.com/questions/7903414/how-are-environments-enclosures-and-frames-related http://obeautifulcode.com/R/How-R-Searches-And-Finds-Stuff/ for some hints on getting all that jazz to work right. MW