Hi,

I am having a problem multiplying a large matrix (about 1500x1500) with a vector.

The code I am trying to run is (CONDITION is the 1500x1500 matrix, and RHS is a 1500x1 vector):

Code: Select all

cout << "CONDITIONED * RHS" <<endl << RHS.row(0)*CONDITION(0,0) << endl;
cout << "RHS BLOCK CONDITIONED" <<endl << CONDITION*RHS << endl;


This returns -1 for the first computation (this is expected) but returns a vector full of -1.#IND for the second cout.

Both CONDITIONED and RHS are MatrixXd objects.

Any help is much appreciated.

your matrix or vector probably already contain some -1.#IND