Hi all - I have a cvMat that I'm trying to send out in a ROS message, but I'm having some issues getting it to work right. My message definition is: float64[9] mat I'm loading data into the message as follows: myMessage h_m; for(int j=0; j<3;++j){ for(int k=0; k<3; ++k){ h_m.mat[j+k*3] = cvmGet(&_h, j, k); } } No errors here, but when I look at the data from a subscriber (or using rostopic echo), but numbers are wrong. Numbers that should be in the range of 0-10 end up in 10^6-10^-5. I've tried creating a std_msgs::Float64 and casting to a Float64 first, neither of which worked. I'm at a bit of a loss as to what's going on. Any help would be appreciated. Thanks, -Dan