[R] How to show the definition of a S3 function?

[David Winsemius]

On Feb 2, 2010, at 11:59 PM, Peng Yu wrote:

> On Tue, Feb 2, 2010 at 10:52 PM, Jeff Laake <Jeff.Laake at noaa.gov>  
> wrote:
>> Try methods("contrast") to see functions.  Depends on class of  
>> fit.  eg
>> contrast.lm
>
> I tried the following command. How to get the definition of, say,  
> contrast.lm?

Just type:

constrast.lm

Unless the method is "*'ed, it will be available without using  
getAnywhere(). See the R-news article by Ligges on accessing source.

>
>> methods("contrast")
> [1] contrast.Design contrast.geese  contrast.gls    contrast.lm
> [5] contrast.lme
>> methods("contrast.lm")
> no methods were found
> Warning message:
> In methods("contrast.lm") :
>  function 'contrast.lm' appears not to be generic
>> contrast.lm
> function (fit, ...)
> contrastCalc(fit, ...)
> <environment: namespace:contrast>
>
>
>
>
>> On 2/2/2010 8:48 PM, Peng Yu wrote:
>>>>
>>>> library(contrast)
>>>> contrast
>>>>
>>>
>>> function (fit, ...)
>>> UseMethod("contrast")
>>> <environment: namespace:contrast>
>>>
>>> I guess the above function is S3. Could somebody let me know how to
>>> show the function body in an R session?
>>>
>>> ______________________________________________
>>> R-help at r-project.org mailing list
>>> 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.
>>>
>>
>
> ______________________________________________
> R-help at r-project.org mailing list
> 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.

David Winsemius, MD
Heritage Laboratories
West Hartford, CT