the code below has me confused:
setClassUnion("index", c("numeric", "character", "logical"))
extends("numeric") # i don't see the class union
library(Matrix)
extends("numeric") # now i see the class union
i am aware that the "Matrix" package separately defines the "index"
class union.
is it the case that class definitions need to occur in packages?
i am also having trouble dispatching on class unions defined in the
global environment,
which may just be the same problem. see code below:
setClassUnion("numORchar", c("numeric", "character"))
foo <- function(x) "Default"
setMethod("foo", signature(x = "numORchar"),
function(x) "numORchar")
foo(2) # gives the default method
franklin
> version
_
platform powerpc-apple-darwin8.7.0
arch powerpc
os darwin8.7.0
system powerpc, darwin8.7.0
status
major 2
minor 4.0
year 2006
month 10
day 03
svn rev 39566
language R
version.string R version 2.4.0 (2006-10-03)
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