Hello,
Is there a way to add vectors to matrices ?
for example :

Code: Select all

MatrixXd m1(2, 2);
m1 << 3,1,
      2,5 ;
VectorXd v(2);
v << 5,
     8 ;



and v + m1 could give

8,6,
10,13


I did not find,
Thank you in advance.

We don't allow that by default as it does not make sense. However you can still achieve this using this explicit expression:

m1.colwise() + v

Thank you for your response
but it does not compile,
the error is

/home/rtrepos/usr/src/vle_dev/eigen_utils/src/test_eigen_utils.cpp: In function ‘int main(int, const char**)’:
/home/rtrepos/usr/src/vle_dev/eigen_utils/src/test_eigen_utils.cpp:159: error: no match for ‘operator+’ in ‘((Eigen::MatrixBase<Eigen::Matrix<double, 10000, 10000, 2, 10000, 10000> >*)(& m1))->Eigen::MatrixBase<Derived>::colwise [with Derived = Eigen::Matrix<double, 10000, 10000, 2, 10000, 10000>]() + v’

ah sorry, this is only in the devel branch. so you can either switch to it (basic features are very stable) or wait until the 3.0 version is out (in a couple of months).

Ok thank you,
I will wait for the next version.