[R] Quantiles with ordered categories

[Bert Gunter]

Inline.
Bert Gunter

"The trouble with having an open mind is that people keep coming along
and sticking things into it."
-- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )


On Tue, Mar 14, 2017 at 12:36 PM,  <matthias-gondan at gmx.de> wrote:
> Dear R users,
>
> This works:
>
> quantile(1:10, probs=0.5)
>
> This fails (obviously):
>
> quantile(factor(1:10), probs=0.5)
>
> But why do quantiles for ordered factors not work either?
>
> quantile(ordered(1:10), probs=0.5)
>
> Is it because interpolation (see the optional type argument) is not defined?
Yes.


Is there an elegant workaround?
No. How can there be? By definition, all that is assumed by an ordered
factor is an ordering of the categories. How can you "interpolate" in
ordered(letters[1:3]) . ASAIK there is no "a.5"  .

-- Bert



>
> Thank you.
>
> Best wishes,
>
> Matthias
>
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