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[Octave-bug-tracker] [bug #47800] gammainc(x, a, "upper") rounds down to


From: Nir Krakauer
Subject: [Octave-bug-tracker] [bug #47800] gammainc(x, a, "upper") rounds down to zero if output is below eps
Date: Wed, 1 Jun 2016 19:08:03 +0000 (UTC)
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_3) AppleWebKit/601.4.4 (KHTML, like Gecko) Version/9.0.3 Safari/601.4.4

Follow-up Comment #35, bug #47800 (project octave):

Yes, a simple scalar C++ implementation of that loop improves the speed quite
a bit.
(after mkoctfile __gammainv_lentz.cc )

(file #37341, file #37342)
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Additional Item Attachment:

File name: __gammainc_lentz.cc            Size:1 KB
File name: gammainc.m                     Size:11 KB


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