[Rd] CRAN Task Views: ctv package available

Achim Zeileis Achim.Zeileis at wu-wien.ac.at
Sat Mar 12 18:04:05 CET 2005

On Sat, 12 Mar 2005, Gorjanc Gregor wrote:

> Hello!
> First of all congratulations for a nice approach to present "R fields" in
> more coherent way. When I started with R I was often frustrated with long
> list of packages, similarities between them, ... If I would take a slow
> approach (one thing at a time) things would be easier from the start, but
> usually one wants to know what a new program is capable of. This is esential
> if one wants really to switch to R.
> About ctv:
> >> Paul Gilbert wrote:
> >> For my own purposes the "Econometrics" view is just fine, but I do
> >> sometimes get questions about dse from people in fields that are
> >> different enough that they might not even know to look in
> >> "Econometrics." A time series view might be useful even if it only
> >> said see also ... .  Another approach to this might be to have
> >> sub-views so, for example, "Econometrics" and "Control theory" could
> >> both point to "Time series."
> > Achim Zeileis responded:
> > Yes, that is, of course, an obvious idea but it requires more
> > coordination between the different views, hence we've decided not to
> > support hierarchically ordered views.
> > Re: "ControlTheory". If someone would raise his hand and provide a view
> > for that, it would be great. It could, of course, link to the
> > "Econometrics" view (and vice versa) but they wouldn't have a formally
> > defined subset in a "TimeSeries" view.
> I think that there is a lot of "fields" where this views cover the same
> stuff. When I first read about ctv I thought it will be implemented more
> in somewhat "hierarchical" or kind of "multiple" way, since for example
> linear models come usefull in many different fields and some people might
> never look under "Econometrics" view as Paul stated.
> I realize that "hierarchical/multiple" is far from easy and I do not have
> any clear idea how to implement it, but it would probably easier to maintain
> larger set of views in such a way and it would be easier to generate new
> ones.

Yes, the implementation would not be the main problem, but the
maintenance. For hierarchical views, there needs to be much more
communication and coordination between the maintainers of related views.
My idea was to keep the work low for the maintainers...hoping that there
would be more people volunteering to maintain a view related to their
field of research or application.

> --
> Lep pozdrav / With regards,
>     Gregor GORJANC
> -----------------------------------------------------------------------
> University of Ljubljana
> Biotechnical Faculty        URI: http://www.bfro.uni-lj.si/MR/ggorjan
> Zootechnical Department     mail: gregor.gorjanc <at> bfro.uni-lj.si
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