An analogue of the LISP backquote macro. bquote quotes its argument except that terms wrapped in .() are evaluated in the specified where environment.
bquote(expr, where = parent.frame())| Parameter | Description |
|---|---|
expr |
A language object. |
where |
An environment. |
# NOT RUN {
require(graphics)
a <- 2
bquote(a == a)
quote(a == a)
bquote(a == .(a))
substitute(a == A, list(A = a))
plot(1:10, a*(1:10), main = bquote(a == .(a)))
## to set a function default arg
default <- 1
bquote( function(x, y = .(default)) x+y )
# }