Timeline for Is there any way to make this numerical integral evaluate faster?
Current License: CC BY-SA 3.0
20 events
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| Jan 28, 2017 at 23:45 | answer | added | Michael E2 | timeline score: 3 | |
| May 22, 2013 at 1:02 | comment | added | Fred Daniel Kline | +1 for the plot of the "Loch Ness" monster. | |
| May 18, 2013 at 14:57 | history | edited | lagoa | CC BY-SA 3.0 |
the previous plot was too rough
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| May 17, 2013 at 14:28 | comment | added | lagoa | I get a negligible better time ( 0.1 secs difference) if the integration method is the LevinRule. | |
| May 17, 2013 at 14:07 | comment | added | gpap | Have you seen the relevant section for "LevinRule" ? It seems to be spot on for oscillatory integrals with small oscillation around a kernel. | |
| May 17, 2013 at 12:19 | comment | added | lagoa | They are important numerical values. I have edited the question with their values. Thanks for pointing it out. | |
| May 17, 2013 at 12:19 | history | edited | lagoa | CC BY-SA 3.0 |
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| May 17, 2013 at 2:26 | history | edited | Mr.Wizard |
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| May 17, 2013 at 2:24 | comment | added | Michael E2 |
What are k, ks and \[Delta]pz? For instance, this takes less than a second to evaluate: NIntegrate[2 Sqrt[\[Pi]] E^(-x^2/2) E^(-(x - X)^2/2) r/Sqrt[(x - x0)^2 + r^2] E^(-ks Sqrt[r^2 + (x - x0)^2]) BesselJ[0, Sqrt[(X + 2*k)^2 + \[Delta]pz^2] r] /. {k -> 1, ks -> 1, \[Delta]pz -> 1, x0 -> 0, X -> 0}, {x, -10, 10}, {r, 0, 10}]
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| May 17, 2013 at 2:23 | history | edited | lagoa | CC BY-SA 3.0 |
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| May 17, 2013 at 1:37 | history | edited | lagoa | CC BY-SA 3.0 |
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| May 16, 2013 at 23:07 | history | tweeted | twitter.com/#!/StackMma/status/335169731113930753 | ||
| May 16, 2013 at 18:49 | history | edited | lagoa | CC BY-SA 3.0 |
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| May 16, 2013 at 18:37 | history | edited | lagoa | CC BY-SA 3.0 |
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| May 16, 2013 at 18:22 | history | edited | lagoa | CC BY-SA 3.0 |
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| May 16, 2013 at 17:38 | history | edited | lagoa | CC BY-SA 3.0 |
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| May 16, 2013 at 17:34 | comment | added | lagoa | This is helpful. It takes 90 seconds now. Thanks!! Other ideas are welcomed. | |
| May 16, 2013 at 16:42 | comment | added | Searke | First try: support.wolfram.com/kb/3442 . Esp turn off symbolic processing if speed is an issue. | |
| May 16, 2013 at 14:36 | history | edited | Dr. belisarius |
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| May 16, 2013 at 14:28 | history | asked | lagoa | CC BY-SA 3.0 |