Consider the following code:
f <- function(x)function(y){x+y}
all.equal(f(5), f(0))
This returns TRUE, when it should return FALSE; I think it’s hard to make the
case that f(5) and f(0) are “approximately equal” in any meaningful sense.
Digging into the code for all.equal(), I see that
On 30/11/2020 1:05 p.m., Kevin Van Horn via R-devel wrote:
Consider the following code:
f <- function(x)function(y){x+y}
all.equal(f(5), f(0))
This returns TRUE, when it should return FALSE; I think it’s hard to make the
case that f(5) and f(0) are “approximately equal” in any meanin
The 'offset' argument description is blank ...
maybe 'additive adjustment to each of the (red, green, blue, alpha)
values defining the colors, after adjustment by the corresponding
\code{.f} factor' ...?
This is the relevant code:
x <- col2rgb(col, alpha = TRUE)/255
x[] <- pmax(0, p
To make the comparison more complete, all.equal.environment could compare
the parents of the target and current environments. That would have to be
recursive but could stop at the first 'top level environment' (the global,
empty, or a package-related environment generally) and use identical
there.
