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[Octave-bug-tracker] [bug #56659] Symmetry of linspace (-a, a, n)
From: |
Marco Caliari |
Subject: |
[Octave-bug-tracker] [bug #56659] Symmetry of linspace (-a, a, n) |
Date: |
Tue, 23 Jul 2019 07:25:19 -0400 (EDT) |
User-agent: |
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:68.0) Gecko/20100101 Firefox/68.0 |
URL:
<https://savannah.gnu.org/bugs/?56659>
Summary: Symmetry of linspace (-a, a, n)
Project: GNU Octave
Submitted by: caliari
Submitted on: Tue 23 Jul 2019 11:25:16 AM UTC
Category: Octave Function
Severity: 1 - Wish
Priority: 5 - Normal
Item Group: Inaccurate Result
Status: None
Assigned to: None
Originator Name:
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Release: dev
Operating System: Any
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Details:
If you generate a vector by
x = linspace (-1, 1, 11);
you discover that it is not symmetric
> x ==-fliplr (x)
ans =
1 1 0 0 0 1 0 0 0 1 1
If you measure the difference you find
> max (abs (x + fliplr (x)))
ans = 2.2204e-16
(while it is eps/2 in matlab).
What about to correct by default the result by performing
x = (x - fliplr (x)) / 2;
at the end?
_______________________________________________________
Reply to this item at:
<https://savannah.gnu.org/bugs/?56659>
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- [Octave-bug-tracker] [bug #56659] Symmetry of linspace (-a, a, n),
Marco Caliari <=