Timeline for Funny behaviour when plotting a polynomial of high degree and large coefficients
Current License: CC BY-SA 3.0
16 events
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| Jul 14, 2022 at 14:11 | history | edited | J. M.'s missing motivation♦ |
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| Feb 13, 2022 at 6:09 | history | edited | Alexey Popkov |
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| Feb 10, 2022 at 17:28 | answer | added | fischertranscripts | timeline score: 3 | |
| Mar 14, 2016 at 6:28 | history | edited | J. M.'s missing motivation♦ | CC BY-SA 3.0 |
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| Mar 13, 2016 at 15:16 | answer | added | J. M.'s missing motivation♦ | timeline score: 15 | |
| Apr 8, 2015 at 16:37 | history | edited | Mr.Wizard |
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| Sep 13, 2014 at 13:02 | answer | added | Michael E2 | timeline score: 33 | |
| Mar 19, 2012 at 12:04 | history | tweeted | twitter.com/#!/StackMma/status/181712661828997120 | ||
| Mar 19, 2012 at 1:16 | comment | added | Daniel Lichtblau | It's cancellation error. Per advice in the response, use higher precision and/or rationalize the coefficients. And be sure you know what you are doing in terms of what might comprise an "expected" outcome, because the result might not mean much if the actual coefficients really have error intervals associated with them. | |
| Mar 18, 2012 at 22:21 | history | edited | rm -rf♦ | CC BY-SA 3.0 |
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| Mar 18, 2012 at 20:11 | history | migrated | from stackoverflow.com (revisions) | ||
| Mar 18, 2012 at 19:49 | vote | accept | CommunityBot | ||
| Mar 18, 2012 at 3:09 | comment | added | aukie | @Mithc, I will have to disagree with you. Just because the terms of the ploynomial get large as z goes to 1 does not mean you should expect this type of erratic behaviour. Indeed the polynomial can have no more than 29 real roots! So why you expect a plot like this is beyond me. You should not have voted the question down. I suspect a numerical issue here and was hoping somebody could help me pin it down. | |
| Mar 18, 2012 at 2:44 | answer | added | Mr.Wizard | timeline score: 64 | |
| Mar 18, 2012 at 2:14 | comment | added | Mike Bailey | Have you considered that you're working with a 29th degree polynomial with insanely huge coefficients? It's not surprising to me that you get a plot like that. It may seem "nice" early on, but that's because z^29 (and other high-order terms) is very small near 0. Near approximately 0.85, it rapidly approaches 1. | |
| Mar 18, 2012 at 2:09 | history | asked | AUK1939 | CC BY-SA 3.0 |