[Octave-bug-tracker] [bug #30968] incorrect sign in conv2 (..., 'valid')

[Thorsten Meyer]

URL:
  <http://savannah.gnu.org/bugs/?30968>

                 Summary: incorrect sign in conv2 (..., 'valid')
                 Project: GNU Octave
            Submitted by: tmeyier
            Submitted on: Sun 05 Sep 2010 12:15:12 PM UTC
                Category: Interpreter
                Severity: 3 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: Thorsten Meyer
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: GNU/Linux

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Details:

In octave freshly built from mercurial, I get the following bug:

A = [1 2 3; 4 5 6; 7 8 9];

conv2(A, [1;-1])
ans =

   1   2   3
   3   3   3
   3   3   3
  -7  -8  -9

octave:72> conv2(A, [1;-1], 'valid')
ans =

  -3  -3  -3
  -3  -3  -3

I believe that the latter should be equal to the middle rows of the first
result.




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