WP 31S available at SourceForge
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04-21-2014, 01:23 PM
Post: #25
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RE: WP 31S available at SourceForge
(04-18-2014 07:12 PM)walter b Wrote: FYI, we've got a problem with the commands contained in DISTR. Indeed. There are also some troubles with the 34s versions that have been mentioned earlier. For instance a simple case like t –1 (p=0,01, df=10) runs for more than 15 seconds on a hardware 34s. So I tried a program in user code, et voilà: less than 5 seconds (resp. 6 in DP). Now imagine how fast this would run in compiled C-code. I assume there's something wrong with the initial guess for the Student quantile. In the above case the method I originally suggested starts with |t|=2,781... (result: –2,7637...), which requires just 4 resp. 5 iterations. Quote:Everything else seems to be working just fine. I beg to differ. Remember the calendar issue and the PRIME? test. BTW - are there any plans on exposing DP mode to the user? If not, several time-consuming 31s functions (especially the distributions) may be rewritten for much faster execution. Remember the HP35 design goal, more than four decades ago: the user should not wait for more than a second until the result appears. ;-) Dieter |
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