Niitsuma Hirotaka wrote:

I enabled ublas::vector as vector data in acc. Plz try attached code

A couple of things: 1) You've put the typeof registration for ublas::vector into the typeof library. It doesn't belong there. It belongs in the ublas library. I think you should contact the owner of ublas for that. 2) You defined a += operator for adding a ublas vector to another ublas vector. Does ublas vector already define this operator? At least, that's what the docs say. 3) Why the "#if 0" code in covariance.hpp? Can you remove the dead code? Thanks for your work on this! -- Eric Niebler Boost Consulting www.boost-consulting.com