Re: min / max and empty intervals (was: Friendly amendment to Motion 25)
Dan & all
If one were supporting a max(ListOfObjects) function then considering max of zero or one object(s) would be necessary, but no, I'm only interested in arity >= 2. In fact max(x1,x2,x3) is just syntactic sugar for max(x1,max(x2,x3)), etc.
On 7 Jun 2011, at 02:11, Dan Zuras Intervals wrote:
> Always assuming, of course, that we DEFINE max(empty,xx) to
> be xx.
I can see why 754 chose the rule it did. Though I wish it had defined two functions, say maxNum which has maxNum(x,NaN)=NaN (NaN="something's wrong") and maxData which has maxData(x,NaN)=x (NaN="missing data"). I think the balance for 1788 is the other way, and max should be like any other point function, whose natural interval extension returns Empty if any input is Empty.
Those who have actually used max/min in interval code should give their view. Vladik, you might have experience of doing statistics on samples of interval data? Nate?
John