Textbooks typically have nice example plots of of the basis for uniform splines when they're explaining the topic. Something like a row of little triangles for a linear spline, or a row of little humps for a cubic spline.
This is a typical example:
I'm wondering if there is an easy way to generate a plot of the spline basis using standard R functions (like bs or ns). I guess there's some simple piece of matrix arithmetic combined with a trivial R program which will spit out a pretty plots of a spline basis in an elegant way. I just can't think of it!