Edit: I think I've found a better way to do what I want for this particular task. I'll leave the question in place in case anyone feels like answering it. My google-fu is weak, so I'm hoping someone ...

I have an input stream that consists of floats. I have a std::vector< std::vector<float> >, because the data is really several columns of numbers, each of which I want to keep seperate. I'm trying to ...