Re: [R] R-Commander - pie charts menu blinded out

From: Peter Dalgaard <P.Dalgaard_at_biostat.ku.dk>
Date: Wed, 06 Feb 2008 15:29:37 +0100

John Fox wrote:
> Dear Peter and Iksmax,
>
> To elaborate slightly, the Rcmdr tries to figure out which menu items are
> appropriate in a given context, and as Peter says, requires that you have at
> least one factor in the active dataset before activating the pie chart menu
> item; only factors will be included in the pie-chart dialog variable list. I
> suppose that this approach sometimes makes it more difficult than necessary
> to do some things that people legitimately want to do, but the idea is to
> protect students in introductory statistics courses -- the target audience
> for the Rcmdr -- from doing foolish things. (If I were really "holier than
> the prophet" I would have omitted pie charts entirely!)
>
>
Perhaps stating the obvious: That remark was intended as tongue-in-cheek....

Apart from protecting people from doing foolish things (there's a famous quote about that, though), there's also the aspect that an interface gets simpler if you reduce the number of choices. So of course it is a valid design decision.

-p

-- 
   O__  ---- Peter Dalgaard             Ă˜ster Farimagsgade 5, Entr.B
  c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
 (*) \(*) -- University of Copenhagen   Denmark          Ph:  (+45) 35327918
~~~~~~~~~~ - (p.dalgaard_at_biostat.ku.dk)                  FAX: (+45) 35327907

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