[Rd] quantile() type 1 for some ordered factors in R-devel

[Kurt Hornik]

>>>>> Tobias Rockel writes:

Thanks for spotting this, and also to Hadley for reporting to me
directly.

Fixed now with c78501.

Best
-k

> Hi,
> In R-devel (2020-05-17 r78478) quantile() type 1 seems to behave a little
> bit strange for some ordered factors:
> quantile(factor(1:3, ordered = TRUE), 0.5, type = 1)
> returns “2” as expected. But
> quantile(factor(2:4, ordered = TRUE), 0.5, type = 1)
> returns “4” and
> quantile(factor(3:5, ordered = TRUE), 0.5, type = 1)
> returns “NA”. Furthermore, the function returns “NA” for calls like
> quantile(factor(c("a", "b", "c"), ordered = TRUE), 0.5, type = 1)

> In R 4.0.0 everything seems fine (return values “2”, “3”, “4”, “b”). If the
> vectors are treated as numeric, everything seems to work fine in R-devel,
> too. For example
> quantile(3:5, 0.5, type = 1)
> returns “4” in R-devel and R 4.0.0.

> Best regards,
> Tobias Rockel

> 	[[alternative HTML version deleted]]

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