There are many wonderful illustrations of parametric curves with b-splines and control points, but I mostly use splines for uni-variate functions. So I have a vector of control values, but not really points--at least not ones I can easily plot.
If we take the three examples in the definition section of the wikipedia article on B-Splines:
https://en.wikipedia.org/wiki/B-spline
How could I determine the control point positions in each example in order to visualize them on the graphs?