% VTB9
% 
% VTB9_1 solves for the natural frequencies, damping ratios, 
%        and mode shapes of a linear second order matrix (LSOM)
%        form system.  (m,d,k)
% VTB9_2 numerically integrates to find the unforced response 
%        of a system using Euler's method.  The system can
%        be in state space or LSOM form.
% VTB9_3 perfoms fourth Runge-Kutta integration on a set of
%        equations described in a specified file.  The 
%        equations need not be linear.
% VTB9_4 numerically integrates to find the forced response 
%        of a system using Euler's method.  The system can
%        be in state space or LSOM form.