MATLAB: Please Help: “Error in odearguments (line 90)” and “Error in ode45 (line 115)”

MATLABode error

I'm trying to model a damped spring and have created the following code
clear all;
m=1;
k=4;
c=1;
omega0=sqrt(k/m);p=c/(2*m);
y0=.01;v0=0;
[t,Y]=ode45(@f,[0,10],[y0,v0],[],omega0,p);
y=Y(:,1);v=Y(:,2);
figure(1);plot(t,y,'b+-',t,v,'ro-');
grid on; axis tight;
%------------------------------------
function dYdt=f(t,Y,omega0,p);
y=Y(1);v=Y(2);
dYdt=[v;-(omega0*omega0)*y-p*v];
end
When I run it I get the following errors.
Unrecognized function or variable 'f'.
Error in odearguments (line 90)
f0 = feval(ode,t0,y0,args{:});   % ODE15I sets args{1} to yp0.
Error in ode45 (line 115)
  odearguments(FcnHandlesUsed, solver_name, ode, tspan, y0, options,
  varargin);
I've seen others code which are basically the same and they seem to get out put, so am I missing a plug in or have I made a mistake? Thanks for any help.

Best Answer

Try this modification
results
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