walkAST {globals} | R Documentation |
Walk the Abstract Syntax Tree (AST) of an R Expression
walkAST(
expr,
atomic = NULL,
name = NULL,
call = NULL,
pairlist = NULL,
substitute = FALSE
)
expr |
R expression. |
atomic , name , call , pairlist |
single-argument function that takes an atomic, name, call and pairlist expression, respectively. Have to return a valid R expression. |
substitute |
If TRUE, |
R expression.