WP34s: date functions and negative years
01-17-2015, 09:25 PM
Post: #5
 walter b On Vacation Posts: 1,957 Joined: Dec 2013
RE: WP34s: date functions and negative years
(01-17-2015 07:19 PM)Dieter Wrote:  I hope this thread encourages the 34s team to change the weird and inconsistent behaviour I described. IMHO the calculator should either throw an error or return a correct result. The latter of course is the preferred solution. There is no third option - not for a calculator on the level of a 34s. And there is a reason why the JD count starts at JD 0 = 1 January 4713 B.C., so arguing that "no one needs date calculations in this range" is not exactly convincing.

Oh dear, that 34S project confronts me with problems I didn't even know before

Seriously, JD 0 was defined to cover all recorded human astronomical observations IIRC. OTOH, how shall the poor WP 34S know that an input of -1.012345 (in D.MY or M.DY) shall mean New Year's day of the year 2345 B.C.? There's a reason why ISO defined Y.MD as standard format for dates.

d:-)
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 Messages In This Thread WP34s: date functions and negative years - Dieter - 01-17-2015, 06:39 PM RE: WP34s: date functions and negative years - Bit - 01-17-2015, 07:05 PM RE: WP34s: date functions and negative years - Dieter - 01-17-2015, 07:19 PM RE: WP34s: date functions and negative years - Massimo Gnerucci - 01-17-2015, 07:31 PM RE: WP34s: date functions and negative years - walter b - 01-17-2015 09:25 PM RE: WP34s: date functions and negative years - Dieter - 01-17-2015, 09:47 PM RE: WP34s: date functions and negative years - walter b - 01-17-2015, 10:03 PM RE: WP34s: date functions and negative years - Dieter - 01-17-2015, 10:07 PM RE: WP34s: date functions and negative years - Paul Dale - 01-18-2015, 01:01 AM RE: WP34s: date functions and negative years - walter b - 01-18-2015, 08:22 AM RE: WP34s: date functions and negative years - Dieter - 01-18-2015, 02:33 PM RE: WP34s: date functions and negative years - walter b - 01-19-2015, 06:35 AM RE: WP34s: date functions and negative years - Dieter - 01-19-2015, 06:55 AM RE: WP34s: date functions and negative years - Paul Dale - 01-19-2015, 07:00 AM RE: WP34s: date functions and negative years - Marcus von Cube - 01-19-2015, 05:08 PM RE: WP34s: date functions and negative years - Dieter - 01-21-2015, 07:26 PM RE: WP34s: date functions and negative years - Marcus von Cube - 01-23-2015, 12:14 PM RE: WP34s: date functions and negative years - Dieter - 01-23-2015, 05:21 PM RE: WP34s: date functions and negative years - Dieter - 01-24-2015, 10:16 PM RE: WP34s: date functions and negative years - rprosperi - 01-24-2015, 10:43 PM RE: WP34s: date functions and negative years - Paul Dale - 01-24-2015, 10:51 PM RE: WP34s: date functions and negative years - Dieter - 01-25-2015, 02:44 PM

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