| Recall {base} | R Documentation |
Recursive Calling
Description
Recall is used as a placeholder for the name of the functionin which it is called. It allows the definition of recursivefunctions which still work after being renamed, see example below.
Usage
Recall(...)Arguments
... | all the arguments to be passed. |
Note
Recall will not work correctly when passed as a functionargument, e.g. to theapply family of functions.
See Also
local for another way to write anonymous recursive functions.
Examples
## A trivial (but inefficient!) example:fib <- function(n) if(n<=2) { if(n>=0) 1 else 0 } else Recall(n-1) + Recall(n-2)fibonacci <- fib; rm(fib)## renaming wouldn't work without Recallfibonacci(10) # 55[Packagebase version 4.6.0Index]