[Octave-bug-tracker] [bug #52593] qr(A, 'matrix') and qr(A, 'vector') return the wrong result with a tall skinny matrix

[Marco Caliari]

Follow-up Comment #2, bug #52593 (project octave):

The problem starts at line 23812 of libinterp/dldfcn/qr.cc


template <typename T>
static typename octave::math::qr<T>::type
qr_type (int nargin, int nargout)
{
  return ((nargout == 0 || nargout == 1)
          ? octave::math::qr<T>::raw
          : (nargin == 2) ? octave::math::qr<T>::economy :
octave::math::qr<T>::std);
}


It is not possible to select the type by just considering the number of input
and output arguments. qr(A,0) is type economy, while qr(A,'matrix') and
qr(A,'vector') are std. And then there are qr(A,B,0), qr(A,B,'matrix'),
qr(A,B,'vector').

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