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[Octave-bug-tracker] [bug #34893] Unexpected and inconsistent conv/conv2
From: |
Nitzan Arazi |
Subject: |
[Octave-bug-tracker] [bug #34893] Unexpected and inconsistent conv/conv2 results |
Date: |
Thu, 24 Nov 2011 21:11:39 +0000 |
User-agent: |
Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.2 (KHTML, like Gecko) Chrome/15.0.874.121 Safari/535.2 |
URL:
<http://savannah.gnu.org/bugs/?34893>
Summary: Unexpected and inconsistent conv/conv2 results
Project: GNU Octave
Submitted by: nitnit
Submitted on: Thu 24 Nov 2011 09:11:38 PM GMT
Category: None
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: Incorrect Result
Status: None
Assigned to: None
Originator Name: Nitzan Arazi
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Release: 3.4.3
Operating System: Microsoft Windows
_______________________________________________________
Details:
I have encountered the following erroneous cases with conv and conv2 with
Mingw builds versions 3.4.2 and 3.4.3.
Case A:
conv([1:5].',[1:2].','valid')
ans =
1
4
7
10
13
10
while the expected output is:
ans =
4
7
10
13
Similarily
conv([1:5],[1:2],'valid')
ans =
1 4 7 10 13 10
while the expected output is:
ans =
4 7 10 13
Case B:
conv2([1:5;1:5],[1:2],'valid')
ans =
5 8 11 14
5 8 11 14
while the expected output is:
ans =
4 7 10 13
4 7 10 13
conv2([1:5;1:5].',[1:2].','valid')
output is OK.
Case C:
conv2([1:5;1:5].',[1:2].','same') % second input var has even number of
elements
ans =
1 1
4 4
7 7
10 10
13 13
while the expected output (as output by m****b) is
ans =
4 4
7 7
10 10
13 13
10 10
Similarily
conv2([1:5;1:5],[1:2],'same')
ans =
1 4 7 10 13
1 4 7 10 13
while the expected output is:
ans =
4 7 10 13 10
4 7 10 13 10
If second input var has odd number of elements, output is OK.
Note: m****b docs defines indices of the second input var as
as floor(([mb nb]+1)/2)
where mb nb are the col and row dimensions of the second input var.
_______________________________________________________
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<http://savannah.gnu.org/bugs/?34893>
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- [Octave-bug-tracker] [bug #34893] Unexpected and inconsistent conv/conv2 results,
Nitzan Arazi <=