Hello,
### I created two classes "A" and "B". "A" is the superclass of "B".
setClass("A", representation(s1="numeric"),prototype=prototype(s1=8))
setClass("B",contains="A",representation(s2="character"),prototype=list(s2="hi"))
myA=new("A")
myB=new("B")
#### I created functions for "A" and "B"
f1=function(x,...) UseMethod("f")
f.default=function(x,...){
print("default")
}
f.A=function(x,...) {
print(paste("x...@s1=", x...@s1, sep=""))
NextMethod()
}
f.B=function(x,...) {
print(paste("x...@s2=", x...@s2, sep=""))
NextMethod()
}
#### when I do
f1(myB)
## R gave me the result
[1] "x...@s2=hi"
[1] "default"
## but I think the result should be
[1] "x...@s2=hi"
[1] "x...@s1=8"
[1] "default"
## because the the NextMethod() should go to f1.A not directly to f1.default.
could you please tell me where I got wrong understanding?
Yu
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