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[Octave-bug-tracker] [bug #29637] hess returns wrong result

From: Stephen Montgomery-Smith
Subject: [Octave-bug-tracker] [bug #29637] hess returns wrong result
Date: Thu, 22 Apr 2010 01:56:06 +0000
User-agent: Mozilla/5.0 (X11; U; FreeBSD amd64; en-US; rv: Gecko/20100325 Firefox


                 Summary: hess returns wrong result
                 Project: GNU Octave
            Submitted by: stephenms
            Submitted on: Thu 22 Apr 2010 01:56:05 AM GMT
                Category: None
                Severity: 3 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: Stephen Montgomery-Smith
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 3.2.4
        Operating System: *BSD



If A is a square matrix, hess(A) returns the wrong result.  According to
"help hess" it should return the matrix converted to upper Hessenberg form. 
But actually it returns the orthogonal matrix used to transform to upper
Hessenberg form.

For example:

gives P when it should give H.  The command "[P H]=hess(A)" does work fine.

This should be really easy for you guys to fix.


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