[wp34s] Poly root finders?
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12-04-2015, 12:58 PM
(This post was last modified: 12-04-2015 01:03 PM by emece67.)
Post: #9
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RE: [wp34s] Poly root finders?
(12-03-2015 10:04 PM)BarryMead Wrote: The REAL component of both roots IS ZERO. Either you are not reading the answers correctly, or the root solver you picked isn't handling complex answers very well. Thanks Barry. I've just double checked it. Polyroot.wp34s reports both roots to be real and, thus, reports their imaginary parts as zero (as their real parts). I know about SLVQ, but I was looking for a poly solver I can trust in everyday use. (12-04-2015 09:34 AM)fhub Wrote: The final version 'PRS' is a quite long program (520 steps), and it was available in the 'HP Articles Forum' for some time I've read about this program but was unable to find it. Of course I'm interested on it, so I'll thank you if you upload it again. In fact, I turned to the Laguerre's method 'cause I read about your program. (12-04-2015 11:50 AM)Dieter Wrote: No, that's not the last version. It lacks several changes and 34s modifications that were introduced later. The final version (AFAIK) is found in the library folder of the 34s package, and it's called polyroot.wp34s. I have just downloaded the last SVN version of polyroot.wp34s, compiled and tested it with 4 different polynomials of the 2nd & 3rd degree (all with real coeffs). In all cases the program crashed with a -∞ Error. These tests were run in the Qt simulator. I have not keyed-in the program, just used copy/paste (for the version in the articles forum) or replaced an old file with a new one (for the SVN version). Still searching... |
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