[R] Setting a new method for generic function to satisfy R CMD check
Dear All,
Can somebody explain me how to correctly set a new class-specific method
for generic functions (e.g. for plot, summary and print). I simply
programmed these functions with the class names and it works perfectly.
E.g.:
x-2
y-3
class(x)-newclass
class(y)-newclass
print.newclass-function(x){ cat(x*10) }
print(x)
print(y)
However, I need the new methods for a new package, and the R CMD check
gives me warnings that my approach is not correct. I have to define
methods and do not use full names as print.newclass.
I read the Writing R Extensions and it is not explained there (at least
to such level that I could get it) and I didn't get anything understandable
by googling.
Maybe someone can help me?
Many thanks in advance!
Mikhail
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Re: [R] Setting a new method for generic function to satisfy R CMD check
On 13-09-21 3:30 PM, Mikhail Beketov wrote:
Dear All,
Can somebody explain me how to correctly set a new class-specific method
for generic functions (e.g. for plot, summary and print). I simply
programmed these functions with the class names and it works perfectly.
E.g.:
x-2
y-3
class(x)-newclass
class(y)-newclass
print.newclass-function(x){ cat(x*10) }
print(x)
print(y)
However, I need the new methods for a new package, and the R CMD check
gives me warnings that my approach is not correct. I have to define
methods and do not use full names as print.newclass.
I read the Writing R Extensions and it is not explained there (at least
to such level that I could get it) and I didn't get anything understandable
by googling.
Maybe someone can help me?
You need to declare methods in the NAMESPACE file, and there is special
markup for them in Rd files.
Duncan Murdoch
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https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
