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From: | anonymous |
Subject: | [Octave-bug-tracker] [bug #35024] magnitude abs(a) != sqrt(a_r^2 + a_i^2) |
Date: | Fri, 09 Dec 2011 07:40:09 +0000 |
User-agent: | Mozilla/5.0 (Windows NT 6.1; WOW64; rv:8.0) Gecko/20100101 Firefox/8.0 |
URL: <http://savannah.gnu.org/bugs/?35024> Summary: magnitude abs(a) != sqrt(a_r^2 + a_i^2) Project: GNU Octave Submitted by: None Submitted on: Fri 09 Dec 2011 07:40:08 UTC Category: None Severity: 3 - Normal Priority: 5 - Normal Item Group: Incorrect Result Status: None Assigned to: None Originator Name: Edward Meewis Originator Email: address@hidden Open/Closed: Open Discussion Lock: Any Release: 3.2.4 Operating System: Microsoft Windows _______________________________________________________ Details: The magnitude of a complex number a must be equal to sqrt(real(a)*real(a) + imag(a)*imag(a)). It isn't. To reproduce: >> a = 2+3i >> abs(a) - sqrt(13) ans = 4.4409e-016 >> abs(a) - sqrt(real(a)*real(a) + imag(a)*imag(a)) ans = 4.4409e-016 _______________________________________________________ Reply to this item at: <http://savannah.gnu.org/bugs/?35024> _______________________________________________ Message sent via/by Savannah http://savannah.gnu.org/
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