[Rd] Recursive objects

Hadley Wickham hadley at rice.edu
Wed May 4 14:26:24 CEST 2011

Hi all,

Does anyone have a comprehensive list of recursive-type objects in R?
is.recursive defines them as by exclusion: "most types of objects are
regarded as recursive, except for  vector types, ‘NULL’ and symbols
(as given by ‘as.name’)."  I think this that means recursive objects

 * lists
 * pairlists
 * calls
 * expressions

Did I miss anything?


Assistant Professor / Dobelman Family Junior Chair
Department of Statistics / Rice University

More information about the R-devel mailing list