reshape implementation ?

[CdeMills]

Hello,

the next problem I'm facing is about reshape. Context:
x=dataframe(randn(3, 3))
Dataframe with 3 rows and 3 columns
 _        X1       X2       X3     
Nr    double   double   double     
 1 -0.106705 -0.77947  0.68085     
 2  0.048692 -0.76935 -0.90692     
 3 -1.675128  0.84691  1.16656 

%#Using matrix conversion:
repmat(mean(x(:,:)), [3 1])
ans =

  -0.57771  -0.23397   0.31350
  -0.57771  -0.23397   0.31350
  -0.57771  -0.23397   0.31350

 repmat(mean(x), [3 1])
=> error. It goes around line 72 of reshape.m
 m = rows (a); n = columns (a); 
 p = idx(1); q = idx(2); 
 x = reshape (a, m, 1, n, 1); => !
reshape: can't reshape 1x1 array to 1x1x3 array
I looked into octave sources; the message is emitted in liboctave/Array.cc,
from the code
template <class T>
Array<T>::Array (const Array<T>& a, octave_idx_type nr, octave_idx_type nc)
  : rep (a.rep), dimensions (nr, nc), 
    slice_data (a.slice_data), slice_len (a.slice_len)
{
  if (dimensions.safe_numel () != a.numel ())
    {
      std::string dimensions_str = a.dimensions.str ();
      std::string new_dims_str = dimensions.str ();
 (*current_liboctave_error_handler)
        ("reshape: can't reshape %s array to %s array",
         dimensions_str.c_str (), new_dims_str.c_str ());
    }
    ...

How does it come that the argument is a dataframe of size 1x3, yet it is
identified as 1x1 array ? There are overloaded rows, colums, numel and size
function for dataframe.

Regards

Pascal
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