I'm trying to find a spline for a set of points and solve it with a tridiagonal (at least thats what my prof wants). But... 1.)I'm unfamiliar with how splines work 2.)I don't see how a tridiagonal matrix will fit in 3.)what will the "Solution" look like? What will the solution of the tridiagonal kick out? I have read the wolfram site and wikipedia as well as many other sites on the issue. I really just need a general explanation of how splines are solved. I.E. not exact equations to find coefficients. Thanks all!