R help - Dec 2005 - Name conflict between Epi and ROC packages

The name conflicts in Epi and ROC packages (2 'ROC' functions are the
problem) cause the following code 
to work once, but not twice:

  library(MASS); data(cats);
  x = cats[,2]
  y = ifelse(cats[,1]=='F',0,1)
  library(Epi); ROC(x,y,grid=0)$AUC
  library(ROC); AUC(rocdemo.sca(y, x, dxrule.sca))    

What is the standard way of resolving name conflicts? Ask maintainers to
resolve it or rename the younger function, use namespaces somehow, or
something else?

My machine is WinXP, R-2.2.0, ROC and Epi packages are the latest versions.

Jarek Tuszynski

	[[alternative HTML version deleted]]

we can use name spaces.  i will try to put one in for ROC ASAP.
best regards

---
Vince Carey, PhD
Assoc. Prof Med (Biostatistics)
Harvard Medical School
Channing Laboratory - ph 6175252265 fa 6177311541
181 Longwood Ave Boston MA 02115 USA
stvjc at channing.harvard.edu

On Thu, 15 Dec 2005, Tuszynski, Jaroslaw W. wrote:
> The name conflicts in Epi and ROC packages (2 'ROC' functions are
the
> problem) cause the following code
> to work once, but not twice:
>
>   library(MASS); data(cats);
>   x = cats[,2]
>   y = ifelse(cats[,1]=='F',0,1)
>   library(Epi); ROC(x,y,grid=0)$AUC
>   library(ROC); AUC(rocdemo.sca(y, x, dxrule.sca))
>
> What is the standard way of resolving name conflicts? Ask maintainers to
> resolve it or rename the younger function, use namespaces somehow, or
> something else?
>
> My machine is WinXP, R-2.2.0, ROC and Epi packages are the latest versions.
>
> Jarek Tuszynski
>

On 15 Dec 2005, JAROSLAW.W.TUSZYNSKI at saic.com wrote:
> The name conflicts in Epi and ROC packages (2 'ROC' functions are
> the problem) cause the following code to work once, but not twice:
>
> library(MASS); data(cats);
> x = cats[,2]
> y = ifelse(cats[,1]=='F',0,1)
> library(Epi); ROC(x,y,grid=0)$AUC
> library(ROC); AUC(rocdemo.sca(y, x, dxrule.sca))    
>
> What is the standard way of resolving name conflicts? Ask
> maintainers to resolve it or rename the younger function, use
> namespaces somehow, or something else?
This may not help you now, but in the next Bioconductor release, the
ROC package will have a name space.  Then you can use ROC::AUC,
ROC::ROC to get the functions you want.

+ seth

apparently there is already a namespace for ROC.  so
whenever you need disambiguation and want to select the
function defined in ROC, use ROC::f
where "f" names a function in ROC package, and "f" is
also used in another package on the searchlist.