Initializing Matrix object from a double* vector

[John W. Eaton]

On 10-Sep-2008, José Luis García Pallero wrote:

| Hello,
| I have a vector (double* v) that contains a matrix in column major order and
| I need to asign the values to a GNU Octave Matrix object. Is there any
| method for initialize the Matrix object without using for loops, something
| like Matrix a(rows,cols,v), for example?

No, because the Matrix object must "own" the data.  So you have to
copy it.  You can do

  Matrix a (rows, cols);
  double *pa = a.fortran_vec ();
  for (octave_idx_type i = 0; i < rows * cols; i++)
    pa[i] = v[i];

jwe