Prof Brian Ripley <[EMAIL PROTECTED]> a écrit :
On Tue, 22 Jul 2008, [EMAIL PROTECTED] wrote:
Hi the list (well, half of the list, only the one who are not on
holidays...)
I am trying to make an S4 package. When I run it on a console,
everything seems ok. When I run R CMD check, I got an error --- 8<
----------------------
Error in setMethod("plot", "ClassX", function(x, y) { : no existing
definition for function "plot"
--- 8< ----------------------
If I add setGeneric("plot",function(x,y,...){standardGeneric("plot")})
in my code, then everything is OK.
This is a surprise for me since I taught that we do not need to
redefine as generic the function that are already generic, like
"plot". Am I wrong ?
Yes. And do read the error message. It says
no existing definition for function "plot"
so this is not if the function is S3 or S4 generic, but that no such
function is visible.
Looks like you forgot to declare a dependence on (or import) package
graphics.
I would have forgot if I knew that I have to declare such a dependence...
Do we have to declare all the depence to all the package ? To base ? To
stats ? I thaught that the package that are include in R when we start
it had not to be include.
Christophe
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