On 1/11/15 9:26 AM, Gilles wrote: > On Fri, 09 Jan 2015 10:55:53 -0700, Phil Steitz wrote: >> There is a feature request implicit in MATH-1185 - to add direct >> computation of (upper) tail probabilities, so users can avoid loss >> of significance errors when computing them from cumulative >> probabilities, which is the only thing they can do with current >> implementations. In some cases, we can fairly easily provide direct >> estimates; in others, not so easy. >> >> What might make sense would be: >> >> * Add an upperTail(x) method to the 4.0 distributions interface >> (maybe with a better name) >> * Add default implementation to AbstractXxDistribution (3.x and 4) >> that returns naive results >> * Add - and doc - better implementations for individual >> distributions as and when we get them > > +1 > [Although we could consider throwing an exception instead of > returning the naive result. Or one method that would throw > and one that would return possibly inaccurate results.] Yeah, UnsupportedOperationException might make sense in place of the naive implementation. Would have to be documented carefully if we decide to do that.
Phil > > > Gilles > >> Phil > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > > --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
