Comparisons with zero on HP-65
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08-30-2017, 06:43 PM
(This post was last modified: 08-30-2017 06:55 PM by Dieter.)
Post: #7
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RE: Comparisons with zero on HP-65
(08-29-2017 10:32 PM)Mark Hardman Wrote: How about: Let me see if I understand this. For x > ln 2 the e^x command returns a value > 2. So DSZ decrements this to a value >1 and the next step is not skipped. For 0 < x < ln 2 the e^x command returns a value between 1 and less than 2. So DSZ decrements this to something between 0 and 0,999... and the next step is skipped. For x < 0 the e^x command returns a value between 0 and less than 1. So DSZ decrements this to something between -1 and 0. I assume that this causes the next step to be skipped. Somewhere between x=–23 and x=–24 the e^x result is so close to 0 that DSZ decrements this to a plain –1. I don't know how if the HP65 then skipped the next step or not, but I can say that the HP67 does not (!). But this way the threshold for skip/no-skip is not 0, but ln 2 = 0,6931... And maybe there is a second threshold somewhere below –20 (not sure). Did I miss something here? Dieter |
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Messages In This Thread |
Comparisons with zero on HP-65 - Matt Agajanian - 08-28-2017, 09:30 PM
RE: Comparisons with zero on HP-65 - Dieter - 08-29-2017, 10:01 PM
RE: Comparisons with zero on HP-65 - Matt Agajanian - 08-29-2017, 10:14 PM
RE: Comparisons with zero on HP-65 - Dieter - 08-29-2017, 10:20 PM
RE: Comparisons with zero on HP-65 - Mark Hardman - 08-29-2017, 10:32 PM
RE: Comparisons with zero on HP-65 - Matt Agajanian - 08-29-2017, 11:08 PM
RE: Comparisons with zero on HP-65 - Dieter - 08-30-2017 06:43 PM
RE: Comparisons with zero on HP-65 - Mark Hardman - 08-30-2017, 09:08 PM
RE: Comparisons with zero on HP-65 - Dieter - 08-31-2017, 07:49 AM
RE: Comparisons with zero on HP-65 - Paul Dale - 08-31-2017, 09:34 AM
RE: Comparisons with zero on HP-65 - Dieter - 08-31-2017, 11:30 AM
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