I've made some changes (in bold) following your comments :
# class definition :
setClass("MyClass", representation(mynumber="numeric"));
# the initilization method :
setMethod("initialize","MyClass",
function(.Object)
{
[EMAIL PROTECTED] <- 10;
return(.Object);
}
);
# defining the generic function generates a warning message (already
generic function)- but everything works fine without it - so it seems
better not to use it
*setGeneric("perform", function(object) standardGeneric("perform"));
*
# the perform method definition - this alone seems sufficient for me,
and S4-looking
*setMethod("perform","MyClass",**
function(object) {
[EMAIL PROTECTED] <- [EMAIL PROTECTED] + 10;
return(object);
} **);*
I replaced my unlucky /.Object/ by /object/ but for method initialize.
The execution of my program used to begin with an output like :
Creating a new generic function for "perform"
With the setMethod only, there is not this output any longer. Does this
mean that the execution becomes faster ?
Thank you for your fast and useful answers. I've found an interesting R
help page I had never seen before at
http://www.maths.lth.se/help/R/S3toS4 which gives additionnal
information about S3 and S4 classes.
Regards,
Laurent
<http://www.maths.lth.se/help/R/S3toS4/>
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