Actually, sum(), all(), any(), prod() all return a _carefully considered_
result in the case of an empty vector. The sum over a disjoint union of sets
should be the sum of the sums over each set, so if a set is empty, its
contribution to the sum must be zero. Similarly, the product over an
Duncan Murdoch wrote:
> To even do that, we would have to first decide which "cases" should produce a
> warning.
> Let's say `1 + x` should give a warning when x = numeric(0). Then should
> `x^2` also produce a warning? Should `x^0.5`? Should `sqrt(x)`?
> Should `log(x)`?
The most probable
On Mon, Jan 16, 2023 at 7:28 PM Duncan Murdoch wrote:
>
> On 16/01/2023 6:55 a.m., David Winsemius wrote:
> >
> >
> > Sent from my iPhone
> >
> >> On Jan 16, 2023, at 6:11 PM, Duncan Murdoch
> >> wrote:
> >>
> >> On 16/01/2023 5:23 a.m., Roland Fuß wrote:
> >>> Dear R-core,
> >>> The language
On 16/01/2023 6:55 a.m., David Winsemius wrote:
Sent from my iPhone
On Jan 16, 2023, at 6:11 PM, Duncan Murdoch wrote:
On 16/01/2023 5:23 a.m., Roland Fuß wrote:
Dear R-core,
The language definition is very clear:
"As from R 1.4.0, any arithmetic operation involving a zero-length
vector
Sent from my iPhone
> On Jan 16, 2023, at 6:11 PM, Duncan Murdoch wrote:
>
> On 16/01/2023 5:23 a.m., Roland Fuß wrote:
>> Dear R-core,
>> The language definition is very clear:
>> "As from R 1.4.0, any arithmetic operation involving a zero-length
>> vector has a zero-length result."
>>
On 16/01/2023 5:23 a.m., Roland Fuß wrote:
Dear R-core,
The language definition is very clear:
"As from R 1.4.0, any arithmetic operation involving a zero-length
vector has a zero-length result."
Thus, `1 + numeric()` returns `numeric(0)`. However, I don't find this
very intuitive because
