Hello,
I too would expected NextMethod to work but the following seems to be
simpler.
"names" is an attribute, so should be accessible with attr.
names.pm = function(p) {
attr(p, "names")
}
p = data.frame(x=1:3, coeff=1)
class(p) = c("pm", class(p));
names(p)
#[1] "x" "coeff"
Hope this helps,
Rui Barradas
Às 18:35 de 03/11/21, Leonard Mada via R-help escreveu:
Dear List members,
Is there a way to access the default names() function?
I tried the following:
# Multi-variable polynomial
p = data.frame(x=1:3, coeff=1)
class(p) = c("pm", class(p));
names.pm = function(p) {
# .Primitive("names")(p) # does NOT function
# .Internal("names")(p) # does NOT function
# nms = names.default(p) # does NOT exist
# nms = names.data.frame(p) # does NOT exist
# nms = names(p); # obvious infinite recursion;
nms = names(unclass(p));
}
Alternatively:
Would it be better to use dimnames.pm instead of names.pm?
I am not fully aware of the advantages and disadvantages of dimnames vs
names.
Sincerely,
Leonard
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