Re: Motion P1788/M007.01_NaI: Discussion period begins
David Hough 754R work schrieb:
performance problem on existing hardware if one believes that the empty
set will sometimes be a frequent operand.
Maybe any
computation which has lots of NaI's is already lost and performance no
longer matters.
I believe that neither will be frequent.
An empty set is usually propagated through the end of an arithmetic
expression, or at worst a modest computation, and then detected and
removed. The same happens to a malformed object pretending to be an
interval.
Missing entries may be more common in some applications; but then
their presence is expected, and one would do on them only few
operations like min or max.
Vincent Lefevre schrieb:
> On 2009-08-06 17:47:18 +0200, J. Wolff v. Gudenberg wrote:
>
> Note that in the other example of missing data (for min function),
> the payload wouldn't solve the problem as the result does not depend
> on the payload.
Why not?
min(x,Missing)=x,
but
min(x,Malformed)=Malformed,
so the payload can be used to distinguish the two cases and create
the correct result.
Arnold Neumaier