function graphit(x,A,endtime)
%Linear system plotter.
%This function provides graphs of all of the variables in the vector, x(t)
%which is the solution to dx/dt=Ax.
%x is an nx1 vector of initial conditions of the x vector.
%A in an nxn matrix of constant coefficient.
%endtime is the size of the time (horizotal) axis.
%The graphs will then appear in a separate window.
%All of the xi's will be separately plotted (in different colors) vs. time.


[M,D]=eig(A);
t=sym('t');
z=exp(diag(D)*t);
x0=x;
y0=inv(M)*x0;
y=y0.*z;
x=M*y;
m=zeros(101,1);
k=zeros(101,length(x));
m(1)=0;
k(1,:)=x0';
n=2;
while n<=101;
    p=0.01*(endtime)*(n-1);
    m(n)=p;
    k(n,:)=double(subs(x,'t',p)');
    n=n+1;
end;
plot(m,k)