From: Spencer Graves <spencer.graves_at_pdf.com>

Date: Fri 21 Jul 2006 - 00:43:14 EST

> sessionInfo()

Version 2.3.1 (2006-06-01)

i386-pc-mingw32*>
*

*> Hmm, ?methods has been containing for a while
*

*>
*

*> methods> Note:
*

*> methods>
*

*> methods> This scheme is called _S3_ (S version 3). For new projects, it is
*

*> methods> recommended to use the more flexible and robust _S4_ scheme
*

*> methods> provided in the 'methods' package. Functions can have both S3 and
*

*> methods> S4 methods, and function 'showMethods' will list the S4 methods
*

*> methods> (possibly none).
*

*>
*

*> So I wonder why nowbody mentioned the official
*

*>
*

*> showMethods()
*

*>
*

*> (or are you all not reading the help pages ;-\) )
*

*>
*

*> It does not always return / print what I want exactly, and in
*

*> the past, at one point I put some effort to make its output more
*

*> customizable.
*

*> I didn't put that effort to the end (*)
*

*> but for the present case
*

*>
*

*> showMethods(class = "ddiMatrix", where = "package:Matrix")
*

*>
*

*> at least is pretty useful.
*

*>
*

*> (*) I think I had added the 'showEmpty = TRUE' argument
*

*> where the current documentation says
*

*>
*

*> showM> showEmpty: logical indicating if methods with empty
*

*> showM> method lists should be shown at all.
*

*> showM> Note that 'FALSE' is _not yet implemented_.
*

*>
*

*> and the non-implementation had a reason: implementation was
*

*> definitely much less simple than I had hoped ...
*

*>
*

*> Martin
*

*>
*

*>
*

*> SpG> Thomas Lumley wrote:
*

*> >> On Wed, 19 Jul 2006, Spencer Graves wrote:
*

*> >>> Am I correct then that the 'methods' function could, at
*

*> >>> least theoretically, be revised so methods(class=...)
*

*> >>> could identify both S3 and S4 methods (ignoring
*

*> >>> inheritance, as it does now, I believe)?
*

*> >>>
*

*> >> Here is a function to find methods for a formal
*

*> >> class. It returns a list with elements corresponding to a
*

*> >> generic, and each element is a list of strings showing
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*> >> all the signatures that contain any of the specified
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*> >> classes.
*

*> >>
*

*> >> If super=TRUE it looks at all superclasses, if ANY=TRUE
*

*> >> it also returns methods for ANY class.
*

*> >>
*

*> >> If you have lme4 loaded, try methods4("lmer"
*

*> >> methods4("ddiMatrix") methods4("ddiMatrix",super=TRUE)
*

*> >>
*

*> >> -thomas
*

*> >>
*

*> >> methods4<-function(classes, super=FALSE, ANY=FALSE){ if
*

*> >> (super) classes<-unlist(sapply(classes, function(cl)
*

*> >> getAllSuperClasses(getClass(cl)))) if (ANY)
*

*> >> classes<-c(classes,"ANY") gens<-allGenerics()@.Data
*

*> >> sigs<-lapply(gens, function(g)
*

*> >> linearizeMlist(getMethods(g))@classes)
*

*> >> names(sigs)<-gens@.Data sigs<-lapply(sigs, function(gen){
*

*> >> gen[unlist(sapply(gen, function(sig) any(sig %in%
*

*> >> classes)))]}) sigs[sapply(sigs,length)>0] }
*

*> >>
*

*> >>
*

*> >> Thomas Lumley Assoc. Professor, Biostatistics
*

*> >> tlumley@u.washington.edu University of Washington,
*

*> >> Seattle
*

*> >>
*

*> >> ______________________________________________
*

*> >> R-help@stat.math.ethz.ch 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.
*

*>
*

*> SpG> ______________________________________________
*

*> SpG> R-help@stat.math.ethz.ch mailing list
*

*> SpG> https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do
*

*> SpG> read the posting guide
*

*> SpG> http://www.R-project.org/posting-guide.html and provide
*

*> SpG> commented, minimal, self-contained, reproducible code.
*

R-help@stat.math.ethz.ch 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. Received on Fri Jul 21 00:49:43 2006

Date: Fri 21 Jul 2006 - 00:43:14 EST

Thanks for the suggestion. Spencer Graves ###################

> sessionInfo()

Version 2.3.1 (2006-06-01)

i386-pc-mingw32

attached base packages:

[1] "methods" "stats" "graphics" "grDevices" "utils" "datasets"
[7] "base"

other attached packages:

lme4 Matrix lattice robustLog "0.995-2" "0.995-11" "0.13-9" "0.0-2" > showMethods(classes="lm")

Function "addNextMethod":

<Empty Methods List>

Function "Arith":

<Empty Methods List>

Function "body<-":

<Empty Methods List>

Function "cbind2":

<Empty Methods List>

Function "coerce":

<Empty Methods List>

Function "Compare":

<Empty Methods List>

Function "initialize":

<Empty Methods List>

Function "loadMethod":

<Empty Methods List>

Function "Math":

<Empty Methods List>

Function "Math2":

<Empty Methods List>

Function "rbind2":

<Empty Methods List>

Function "show":

<Empty Methods List>

Function "Summary":

<Empty Methods List>

**NULL
**

> showMethods(classes="lmer")

Function "addNextMethod":

<Empty Methods List>

Function "Arith":

<Empty Methods List>

Function "body<-":

<Empty Methods List>

Function "cbind2":

<Empty Methods List>

Function "coerce":

<Empty Methods List>

Function "Compare":

<Empty Methods List>

Function "initialize":

<Empty Methods List>

Function "loadMethod":

<Empty Methods List>

Function "Math":

<Empty Methods List>

Function "Math2":

<Empty Methods List>

Function "rbind2":

<Empty Methods List>

Function "show":

<Empty Methods List>

Function "Summary":

<Empty Methods List>

**NULL
**
Martin Maechler wrote:

>>>>>> "SpG" == Spencer Graves <spencer.graves@pdf.com> >>>>>> on Wed, 19 Jul 2006 15:23:58 -0700 writes:

>

> SpG> Hi, Thomas: Thanks very much. I haven't tried it yet,

> SpG> but it looks very useful. Best Wishes, Spencer Graves

R-help@stat.math.ethz.ch 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. Received on Fri Jul 21 00:49:43 2006

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