On 03/11/2007 4:34 PM, Ulrike Gr?mping wrote:> Dear all,
>
> I got stuck with a weird behavior of pretty:
> pretty(c(-1,1),n=1)
> yields -2, 0, 2 instead of the desired result -1 1.
> Likewise,
> pretty(c(-2,2),n=1)
> yields -5, 0, 5 instead of the desired result -2 2.
I don't think pretty() should ever return -1 1 or -2 2. It should
always return multiples of some round number, so it would have to
include 0. But I don't see why it is expanding the range. It doesn't
do that when the results are non-negative, e.g.
> pretty(0:1, n=1)
[1] 0 1
> pretty(0:2, n=1)
[1] 0 2
> With n=0, the result is the same, while with n=2 everything is as
> documented.
>
> This behavior nastily messed up some of my cube plots. Is there any chance
> that this can be fixed?
The documentation has been sitting for 8 years with "FIXME" notes in
it,
so I wouldn't hold my breath.
Duncan Murdoch