[R] warning on generic function when building R package

[Bert Gunter]

What is the class attribute of your (misnamed) x.pt argument? If it does
not inherit from class "func" then your plot.func method will not be used
when you call plot(). You would need to explicitly call plot.func()
instead.  If this question/comment makes no sense to you, then you have
some serious homework to do before you post further. Otherwise, follow the
advice you have been given.

Bert

On Monday, October 19, 2015, carol white via R-help <r-help at r-project.org>
wrote:

> Thanks Murdoch.
> defining
> plot.func<- function(x=x.init, y=y.init, arg3, arg4, "title", col, arg5)
> and if plot doesn't take the exact parameters of plot.func but modified of
> these parametersplot(x=x.pt,y=y.pt,xlim = c(0, 10), ylim = c(0,1), xlab=
> "xlab", ylab="ylab", main = "title", col = col,type = "l")
> then, how to define and invoke to be consisent?
> Regards,
>
>      On Monday, October 19, 2015 7:45 PM, Duncan Murdoch <
> murdoch.duncan at gmail.com <javascript:;>> wrote:
>
>
>  On 19/10/2015 1:29 PM, carol white via R-help wrote:
> > Hi,I have invoked plot in a function (plot.func) as follows but when I
> check the built package, I get a warning:
> > plot(x.pt,y.pt,xlim = c(0, 10), ylim = c(0,1), xlab= "xlab",
> ylab="ylab", main = "title", col = col,type = "l")
> > R CMD check my.package
> > checking S3 generic/method consistency ... WARNING
> > plot:
> >  function(x, ...)
> > plot.func:
> >  function(x.pt, y.pt, arg3, arg4, "title", col, arg5)
> >
> > See section ‘Generic functions and methods’ in the ‘Writing R
> > Extensions’ manual.
> > Which plot argument is illegitimate or missing and how to eliminate the
> warning?
>
> The first argument to plot.func needs to be called "x" if you want to
> use it as a method.  Method signatures need to be consistent with the
> generic signature.
>
> Duncan Murdoch
>
>
>
>
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>
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-- 
Bert Gunter

"Data is not information. Information is not knowledge. And knowledge is
certainly not wisdom."
   -- Clifford Stoll

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