Re: [boost] Re: Date iterators in Boost Date-Time
On the other hand, "hull" encompasses the idea of a "periodic hull" that can be used for periodic intervals of time... On Monday, August 18, 2003, at 02:39 PM, John Fuller wrote: It also has the advantage of being similar to the use of "makespan" as the time from the start time of the first job to the completion time of the last job in job scheduling problems. On Monday, August 18, 2003, at 02:18 PM, Victor A. Wagner, Jr. wrote: I suggested it because we write software for people who run multiple experiments with "rest periods" between the data collection sessions. They seem to use the word span to specify the approximate duration of the series of tests. "These experiments were conducted over a span of 3 weeks." Then again, Americans are notorious for abuse of the language, but around University of Arizona's Neural Systems, Memory & Aging Lab it would certainly be understood. At Monday 2003-08-18 11:39, you wrote: "Victor A. Wagner, Jr." <[EMAIL PROTECTED]> writes: | how about "span" ? when read as "the period of time spanned by these two", I can make sense of it, even not as a mathematician :-) Well, I don't know how it sounds to native speakers. -- Gaby ___ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost Victor A. Wagner Jr. http://rudbek.com The five most dangerous words in the English language: "There oughta be a law" ___ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost ___ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
Re: [boost] Re: Date iterators in Boost Date-Time
It also has the advantage of being similar to the use of "makespan" as the time from the start time of the first job to the completion time of the last job in job scheduling problems. On Monday, August 18, 2003, at 02:18 PM, Victor A. Wagner, Jr. wrote: I suggested it because we write software for people who run multiple experiments with "rest periods" between the data collection sessions. They seem to use the word span to specify the approximate duration of the series of tests. "These experiments were conducted over a span of 3 weeks." Then again, Americans are notorious for abuse of the language, but around University of Arizona's Neural Systems, Memory & Aging Lab it would certainly be understood. At Monday 2003-08-18 11:39, you wrote: "Victor A. Wagner, Jr." <[EMAIL PROTECTED]> writes: | how about "span" ? when read as "the period of time spanned by these two", I can make sense of it, even not as a mathematician :-) Well, I don't know how it sounds to native speakers. -- Gaby ___ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost Victor A. Wagner Jr. http://rudbek.com The five most dangerous words in the English language: "There oughta be a law" ___ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost ___ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
Re: [boost] Re: Date iterators in Boost Date-Time
HL7 v3, a health care application layer specification, uses the term with time intervals as
an operation on a totally ordered set that produces the smallest interval that is a superset.
For example, hull({[1,5], [7,10]}) == [1,10]
The unabridged specification part II available on Dr. Schadow's page http://aurora.regenstrief.org/v3dt/
gives nice examples.
On Sunday, August 17, 2003, at 05:13 PM, Paul A. Bristow wrote:
But as Michael Caine said "Not a lot of people know that" - so I trust you will
explain what it does too for the benefit of us mere non-mathematical mortals!
Paul
| -Original Message-
| From: [EMAIL PROTECTED]
| [mailto:[EMAIL PROTECTED] Behalf Of [EMAIL PROTECTED]
| Sent: Sunday, August 17, 2003 7:11 AM
| To: Boost mailing list
| Subject: Re: [boost] Re: Date iterators in Boost Date-Time
|
|
| En réponse à Jeff Garland <[EMAIL PROTECTED]>:
|
| I just wanted to mention that the interval library names this
| operation "hull".
| It is a mathematically defined term since the operation is indeed a
| convex hull.
|
| Just my two eurocents,
|
| Guillaume
|
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