On Thu, 14 Aug 2014, Michael Haupt wrote:
Hello,
given that `*tmp*` is removed after a replacement, how can code like this work?
Is there some special handling for a variable named `*tmp*` when it comes to
make element assignments?
x<-c(1,2)
x[1]<-42
`*tmp*`[1]<-7 # I would expect this one to fail
`*tmp*`
Error: object '*tmp*' not found
This is a consequence of the tricks the interpreter implementation
currently plays to do complex assignments. Compiled code works
differently:
library(compiler)
cmpfun(function() {
+ x<-c(1,2)
+ x[1]<-42
+ `*tmp*`[1]<-7 # I would expect this one to fail
+ })()
Error in cmpfun(function() { : object '*tmp*' not found
luke
Confused greetings,
Michael
--
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-tier...@uiowa.edu
Iowa City, IA 52242 WWW: http://www.stat.uiowa.edu
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