[R] generic/method consistency ?

Torsten Hothorn Torsten.Hothorn at rzmail.uni-erlangen.de
Tue Jun 18 10:43:48 CEST 2002


> Dear R-list 
> 
> I am compiling my first R-package and I get this warning: 
> 
> ... 
> * checking generic/method consistency ... WARNING 
> plot: 
>   function(x, ...) 
> plot.SimNI: 
>   function(tags, closedArea, color, ...) 
> ...

plot is a generic function with parameter x and dots: 

function (x, ...) 
{
    if (is.null(attr(x, "class")) && is.function(x)) {
        if ("ylab" %in% names(list(...))) 
            plot.function(x, ...)
        else plot.function(x, ylab = paste(deparse(substitute(x)), 
            "(x)"), ...)
    }
    else UseMethod("plot")
}

therefore, your method "plot.SimNI" must have an argument "x". e.g. 

plot.SimNI <- function(x, tags, closedArea, color, ...) {...}

where x is an object of class "SimNI". 

Torsten

> 
> What does this mean exactly? 
> 
> Thanks in advance. 
> 
> Anders. 
> 
> 
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