Iam getting an error with the ODE45 function (line 90)and (line 115)?

function v=f(t,x)

k=120000 ; %The stiffnes value of structure N/s

c=1000 ; %The damping value of structure kg/s

m=1000 ; %The total massa of structure kg

Fo=150;

w=5;

v=[x(2);x(2)*-(k/m) + x(2)*-(c/m) + Fo/m *cos(w*t)];% the equat?on of motion of the single degree

%of freedome under the harmonic load ( Fo.cos(wt)).

end

and ...

clc

clear

y0=[0,01 0,5]; %enter the initial conditions.

t0=[0 60] ; %enter the first and final time for the analysis.

[t,x]=ode45('f',t0,y0);

plot (t,x(:,1))%plot the results.

ERRORS:

Undefined function or variable 'v'.

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);

Answer 1

[Stephan]

clc
clear
y0=[0.01 0.5]; %enter the initial conditions.
t0=[0 60] ; %enter the first and final time for the analysis.
[t,x]=ode45(@f,t0,y0); 
plot (t,x(:,1))%plot the results.

function v=f(t,x) 
k=120000 ; %The stiffnes value of structure N/s
c=1000 ; %The damping value of structure kg/s
m=1000 ;  %The total massa of structure kg
Fo=150;
w=5; 
v=[x(2);x(2)*-(k/m) + x(2)*-(c/m) + Fo/m *cos(w*t)];% the equat?on of motion of the single degree
%of freedome under the harmonic load ( Fo.cos(wt)).
end

[MAHMOUD NASSAR]

thank u , but it still give me the same error

Error in ode45 (line 115)

odearguments(FcnHandlesUsed, solver_name, ode, tspan, y0, options, varargin);

[Stephan]

for me the code works