Hi,

As the following works well:

Code: Select all

ArrayXXf a(3,3);
a <<  1, 2, 3,
      4, 5, 6,
      7, 8, 9;
         
ArrayXXf b(3,1);
b << 1,2,3;

cout << a.matrix() * b.matrix() << endl;

I don't understand why the following doesn't work:

Code: Select all

ArrayXXf a(3,3);
a <<  1, 2, 3,
      4, 5, 6,
      7, 8, 9;
         
ArrayXf b(3);
b << 1,2,3;
   
cout << a.matrix() * b.matrix() << endl;

I get a "No member named 'data' in Eigen::MatrixWrapper" because of the matrix multiplication. If I print b.matrix().rows() and b.matrix().cols() I still get 3 and 1. So why doesn't the multiplication work? A MatrixXf and VectorXf multiplication would work.

that's a bug from us. Fixed in devel and 3.0.x branches. thanks for the report.

Thanks!