# What is: vector<vector<Point2f> > imagePoints;

Hi there,

I am trying to understand the following Structure: `vector<vector<Point2f> > imagePoints;`

What is a vector in OpenCV, I the documentation there was nothing under Basic Structures and so on.
So i figured it must be the standard c++ vector.
So I have an one-dimensional array filled with one-dimensional arrays but what does Point2f mean?

Thanks in Advance