[R] BUG: atan(1i) / 5 = NaN+Infi ?

[Bert Gunter]

Perhaps

> Inf*1i
[1] NaN+Infi

clarifies why it is *not* a bug.
(Boy, did that jog some long dusty math memories :-)  )

-- Bert

On Thu, Sep 5, 2024 at 2:48 PM Duncan Murdoch <murdoch.duncan using gmail.com>
wrote:

> On 2024-09-05 4:23 p.m., Leo Mada via R-help wrote:
> > Dear R Users,
> >
> > Is this desired behaviour?
> > I presume it's a bug.
> >
> > atan(1i)
> > # 0+Infi
> >
> > tan(atan(1i))
> > # 0+1i
> >
> > atan(1i) / 5
> > # NaN+Infi
>
> There's no need to involve atan() and tan() in this:
>
>  > (0+Inf*1i)/5
> [1] NaN+Infi
>
> Why do you think this is a bug?
>
> Duncan Murdoch
>
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