Hi ,

In the Eigen doc , only initialization of real number matrix is mentioned, but how do I initialize complex number matrix with "<<"?
The real matrix case :
Matrix3f m;
m << 1, 2, 3,
4, 5, 6,
7, 8, 9;
std::cout << m

That's not related to Eigen, but to general C++. Use std::complex constructor, e.g.:

typedef std::complex<double> cd;
m << cd(2,3), cd(1.2,-45), ....;