[WP34s] More constants than CONST offers
05-29-2014, 03:43 PM (This post was last modified: 05-29-2014 04:03 PM by Dieter.)
Post: #5
 Dieter Senior Member Posts: 2,397 Joined: Dec 2013
RE: [WP34s] More constants than CONST offers
(05-26-2014 11:32 PM)Paul Dale Wrote:  Not all are relevant or usefully exposed, but some might be:

Is this a complete, comprehensive list of all available constants not included in the CONST menu? A few of these would really make sense, for instance multiples of pi like pi/2, pi/4, 2pi and, as already mentioned, sqrt(2pi).

Walter said he does not like constants that can easily be obtained from others. Great – this way we can get rid of a lot of physical constants. Take for instance h and ħ (which is simply h divided by 2 pi) or Φ0 which is nothing but 1/Kj and therefore as useful has having a separate 1/pi constant (which would even have the benefit of slightly better accuracy). Removing redundancies like these will free up space for universally useful constants like the ones suggested.

Hey, I just found a way how to use the additional constants with current firmware: simply use the CNST command. This is what I got:

Code:
CNST 77 = 1/eH (higher 34 digits of 1/e, as used in Lambert's W) CNST 78 = 1/eL (lower 34 digits of 1/e, as used in Lambert's W) CNST 79 = 1/√5 CNST 80 = 1/√pi CNST 81 = 0,2214  (currently used in the Chi² quantile, will be obsolete with the suggested new quantile code) CNST 82 = 1/ln10 CNST 83 = ln 2 CNST 84 = 1/ln2 CNST 85 = pi CNST 86 = pi/2 CNST 87 = √2pi CNST 88 = 122,134  (counter/pointer used in Romberg integration)

So at least these constants can be used in user programs. Readability is another point...

Dieter
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 Messages In This Thread [WP34s] More constants than CONST offers - Dieter - 05-26-2014, 08:34 PM RE: [WP34s] More constants than CONST offers - walter b - 05-26-2014, 08:51 PM RE: [WP34s] More constants than CONST offers - Dieter - 05-26-2014, 09:05 PM RE: [WP34s] More constants than CONST offers - Paul Dale - 05-26-2014, 11:32 PM RE: [WP34s] More constants than CONST offers - Dieter - 05-29-2014 03:43 PM