Hi,

the code at the end gives very strange error messages (at least for beginners)

How to implement the Matlab/Scilab notation

A= 2*(A-0.5)

in an elegant way.

I tried (failed miserably)

#include
using std::cout; using std::endl;

#include
using std::log; using std::sqrt;

#include
// import most common Eigen types
USING_PART_OF_NAMESPACE_EIGEN

int main() {
int N=5;
MatrixXd A = MatrixXd::Random(N,N);
A= 2*(A.cwise()-0.5); // transform matrix elements to be in [-1,1)
cout << "A=n" << A << endl;
}

Thanks for a hint,
Helmut.