[Octave-bug-tracker] [bug #41448] ppval returns wrong dimensions for scalar valued polynomial

[Markus Appel]

URL:
  <http://savannah.gnu.org/bugs/?41448>

                 Summary: ppval returns wrong dimensions for scalar valued
polynomial
                 Project: GNU Octave
            Submitted by: mappel
            Submitted on: Mon 03 Feb 2014 08:10:44 PM GMT
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 3.8.0
        Operating System: GNU/Linux

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Details:

YI = ppval (PP, XI) is documented with:
"If PP describes a scalar polynomial function, the result is an array of the
same shape as XI."

But:

octave:35> ppval ( mkpp([0 1],1), magic(3) )
ans =

ans(:,:,1) =

   1   1   1

ans(:,:,2) =

   1   1   1

ans(:,:,3) =

   1   1   1


I would the result expect to be a 3x3 matrix, i.e. :


assert ( ppval ( mkpp([0 1],1), magic(3) ) , ones(3,3) )


I checked in Matlab R2012b, there the function ppval returns a 3x3 matrix as
documented.




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