Hi to all members, i have a question about class inheritance and methods
using R.oo package:
I have the following code and it doesn't work, guess i'm doing smth wrong
and there is nothing in the help.
library(R.oo)
setConstructorS3("ClassA", function(A=15) {
extend(Object(), "ClassA",
.size = A
);
})
setMethodS3("print", "ClassA", function(this,...) {
print(paste('Class A:',this$.size));
})
objA<-ClassA();
objA
[1] "Class A: 15"
setConstructorS3("ClassB", function(B=15) {
extend("ClassA", "ClassB",
.size2 = B
);
})
setMethodS3("print", "ClassB", function(this,...) {
print(paste('Class B:',this$.size2));
})
objB<-ClassB();
objB
Error in this$.size2 : $ operator is invalid for atomic vectors
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