methods and try() [R-devel]
On Wed, 15 Aug 2007, Byron Ellis wrote:
Hi all, I'm having a problem with some sort of interaction with try() and methods, I think. The setup is as follows, I have an S4 class that holds an environment and I would like to evaluate the right hand side of a function inside that environment. No problem there. However, if the formula involves a symbol that doesn't exist, which may or may not happen, it fails as it should and reports and error "blah blah does not exist." As it should. When I wrap that same call in a try() statement, the error becomes "no function to return from, jumping to top level," bypassing the try statement and generally wreaking havoc. Any clues what might be causing this?
Yes. There is no context on the stack that corresponds to the environment to which a jump is to be made. Why that is the case is impossible to tell without a simple reproducible example. Best, luke
Luke Tierney
Chair, Statistics and Actuarial Science
Ralph E. Wareham Professor of Mathematical Sciences
University of Iowa Phone: 319-335-3386
Department of Statistics and Fax: 319-335-3017
Actuarial Science
241 Schaeffer Hall email: luke at stat.uiowa.edu
Iowa City, IA 52242 WWW: http://www.stat.uiowa.edu