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HP41C random number generator help
12-08-2017, 04:26 AM (This post was last modified: 12-08-2017 04:33 AM by Trond.)
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RE: HP41C random number generator help
(12-05-2017 12:30 PM)Namir Wrote:  A good and simple algorithm (used by HP since the HP-65 Stat Pacs) is:

r = frac(997 * r)

RCL 00
STO 00

In my HHC2017 presentation about PRNGs, I pointed out that the above legacy algorithm is recommended for its speed, simplicity, and relatively good results for calculators.

I tried a version of this while trying to avoid "bad seeds". I built a program that first checks if the variable 00 has anything above 0 beyond the fifth decimal point, and if not it adds pi, then goes on to multiply with 997, does FRC and STO 00. If 00 does have a digit at the fifth decimal it will simply do the last three steps. Looks to work fine for me, but it is no longer as simple of course.
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HP41C random number generator help - Trond - 12-05-2017, 05:45 AM
RE: HP41C random number generator help - Trond - 12-08-2017 04:26 AM

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