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From: | Lachlan Andrew |
Subject: | [Octave-bug-tracker] [bug #48307] sinc loses precision for large arguments |
Date: | Mon, 27 Jun 2016 00:37:02 +0000 (UTC) |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:43.0) Gecko/20100101 Firefox/43.0 |
Update of bug #48307 (project octave): Status: None => Patch Submitted _______________________________________________________ Follow-up Comment #6: The attached patch should improve the accuracy for large arguments. For example, sinc (1e10) gives 0. The downside is that it is about 40% slower for scalars or 20% slower for large vectors. I'm not sure how important that is. It could be sped up slightly for large vectors of small arguments by only doing the reduction modulo 2 for large components. I'd be inclined to have a separate sinc_robust to evaluate sinc accurately for large arguments, and keep the default sinc as something that is fast for typical arguments. (file #37591) _______________________________________________________ Additional Item Attachment: File name: bug_48307_sinc.cset Size:0 KB _______________________________________________________ Reply to this item at: <http://savannah.gnu.org/bugs/?48307> _______________________________________________ Message sent via/by Savannah http://savannah.gnu.org/
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