R help - Jul 2004 - How to check the code for generic function in a specific package?

Hello, R people,

 

I am a R beginner. I searched the R-FAQ and R-help and failed to find the
answers. 

 

Could anyone tell me how to check (or edit) a generic function within a
specific package? If the function is not generic, I can just type the
function name at the R prompt or use "fix()" and "edit()".

 

Thanks a lot.

 

Frank


	[[alternative HTML version deleted]]

F Duan wrote:
> Hello, R people,
> 
>  
> 
> I am a R beginner. I searched the R-FAQ and R-help and failed to find the
> answers. 
> 
>  
> 
> Could anyone tell me how to check (or edit) a generic function within a
> specific package? If the function is not generic, I can just type the
> function name at the R prompt or use "fix()" and
"edit()".
fix() *does* work for me, giving you expect that the fucntion is not 
"fixed" within the package, but a new (changed) instance is created in
your Workspace.....

What do you expect to happen? What is the error message (if there is any)?

In order to change packages, you might want to edit the package sources 
directly.

Uwe Ligges


>  
> 
> Thanks a lot.
> 
>  
> 
> Frank
> 
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html

Thanks for your answer. My problem is:

For example, I want to check the code for function "boxplot" and do
some
modifications in a specific package, but "boxplot" has also been
defined in
another package (e.g., graphics). Therefore, when I type "boxplot" or
"fix(boxplot)" at the R prompt, I only get a message like:
> boxplot
 standardGeneric for "boxplot" defined from package
"graphics"

 function (x, ...) 
 standardGeneric("boxplot")
 <environment: 02D4FC14>
 Methods may be defined for arguments: x  


There is no source code pop-up, either for the package "graphics" or
the
package I am working with.

Frank Duan


-----Original Message-----
From: Uwe Ligges [mailto:ligges at statistik.uni-dortmund.de] 
Sent: Monday, July 05, 2004 17:58
To: F Duan
Cc: r-help at stat.math.ethz.ch
Subject: Re: [R] How to check the code for generic function in a specific
package?

F Duan wrote:
> Hello, R people,
> 
>  
> 
> I am a R beginner. I searched the R-FAQ and R-help and failed to find the
> answers. 
> 
>  
> 
> Could anyone tell me how to check (or edit) a generic function within a
> specific package? If the function is not generic, I can just type the
> function name at the R prompt or use "fix()" and
"edit()".
fix() *does* work for me, giving you expect that the fucntion is not 
"fixed" within the package, but a new (changed) instance is created in
your Workspace.....

What do you expect to happen? What is the error message (if there is any)?

In order to change packages, you might want to edit the package sources 
directly.

Uwe Ligges


>  
> 
> Thanks a lot.
> 
>  
> 
> Frank
> 
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html

What version of R are you using?  In R-1.9.1 (on WinXPPro), I get:
> boxplot
function (x, ...) 
UseMethod("boxplot")
<environment: namespace:graphics>

... and that _is_ what an S3 generic looks like.  I suspect you really want
to define a boxplot method for some class for which there's no boxplot
method yet.  If so, just create a function named boxplot.myclass (substitute
`myclass' for the name of the class).  If you want to see what the default
method looks like for boxplot, type boxplot.default (which is _not_ hidden
behind the namespace for `graphics').

Andy
> From: F Duan
> 
> Thanks for your answer. My problem is:
> 
> For example, I want to check the code for function "boxplot" 
> and do some
> modifications in a specific package, but "boxplot" has also 
> been defined in
> another package (e.g., graphics). Therefore, when I type
"boxplot" or
> "fix(boxplot)" at the R prompt, I only get a message like:
> 
> > boxplot
>  standardGeneric for "boxplot" defined from package
"graphics"
> 
>  function (x, ...) 
>  standardGeneric("boxplot")
>  <environment: 02D4FC14>
>  Methods may be defined for arguments: x  
> 
> 
> There is no source code pop-up, either for the package 
> "graphics" or the
> package I am working with.
> 
> Frank Duan
> 
> 
> -----Original Message-----
> From: Uwe Ligges [mailto:ligges at statistik.uni-dortmund.de] 
> Sent: Monday, July 05, 2004 17:58
> To: F Duan
> Cc: r-help at stat.math.ethz.ch
> Subject: Re: [R] How to check the code for generic function 
> in a specific
> package?
> 
> F Duan wrote:
> 
> > Hello, R people,
> > 
> >  
> > 
> > I am a R beginner. I searched the R-FAQ and R-help and 
> failed to find the
> > answers. 
> > 
> >  
> > 
> > Could anyone tell me how to check (or edit) a generic 
> function within a
> > specific package? If the function is not generic, I can 
> just type the
> > function name at the R prompt or use "fix()" and
"edit()".
> 
> fix() *does* work for me, giving you expect that the fucntion is not 
> "fixed" within the package, but a new (changed) instance is 
> created in 
> your Workspace.....
> 
> What do you expect to happen? What is the error message (if 
> there is any)?
> 
> In order to change packages, you might want to edit the 
> package sources 
> directly.
> 
> Uwe Ligges
> 
> 
> 
> >  
> > 
> > Thanks a lot.
> > 
> >  
> > 
> > Frank
> > 
> > 
> > 	[[alternative HTML version deleted]]
> > 
> > ______________________________________________
> > R-help at stat.math.ethz.ch mailing list
> > https://www.stat.math.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide!
> http://www.R-project.org/posting-guide.html
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide! 
> http://www.R-project.org/posting-guide.html
> 
>