I’ve put together a collection of functions — some direct quotes of other contributed functions, some renamed or repackaged, and some newly implemented — for various needed tasks in my undergraduate ordinary differential equations course.

I’ve written elsewhere about the Backward Difference Formula implementations, the phase space visualization functions, the matrix extractors, and the numerical solutions plotters.

The package includes my home-grown help utility.

You can download the package MATH280.mac

MATH280.mac contains: wxphaseplot2d(s) wxphaseplot3d(s) phaseplot3d(s) wxtimeplot(s) plotdf(rhs) wxdrawdf(rhs) sol_points(numsol,nth,mth) rkf45(oderhs,yvar,y0,t_interval) BDF2(oderhs,yvar,y0,t_interval) BDF2a(oderhs,yvar,y0,t_interval) odesolve(eqn,depvar,indvar) ic1(sol,xeqn,yeqn) ic2(sol,xeqn,yeqn,dyeqn) eigU(z) eigdiag(z) clear() - - for any of the above functions, help(function_name) returns help lines for function_name - Last Modified 5:00 PM 3/27/2017