Hi!
I wondering about the behavior of the 'as' function.
After reading the following sentences:
?as:
Returns the version of this object coerced to be the given Class.
and page 285 of programming with data:
"When a class extends another class, a call to as on the ...
Specially page 292
"If tx is an object of a class that extends matrix,
as(tx,"matrix")
extracts the portion of its representation forming the included matrix object."
I would expect that as(tmp,"list") in the example below will extract the list part of
trackList together with the names attributes of the list.
setClass("trackList"
,representation(info="character")
,contains="list")
tmp<-new("trackList",list(a=c(1,1),b=c(2,3,4),d=c("u","v","w")))
as(tmp,"list")
[[1]]
[1] 1 1
[[2]]
[1] 2 3 4
[[3]]
[1] "u" "v" "w"
Where the names attributes are gone?
On the other hand a call to as(tm,"matrix") as in the next example keeps the names
attribute of the matrix.
setClass("trackMatrix"
,representation(info="character")
,contains="matrix")
tmp<-matrix(1:9,3)
rownames(tmp)<-c("a","b","c")
colnames(tmp)<-c(1:3)
tm<-new("trackMatrix",tmp)
as(tm,"matrix")
Is this behaviour intended (if so why) or is it a bug?
Sincerely
Eryk
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