Too many input arguments and ODE error

I have attached two .m files. One is the code to solve an multiple DoF equation using state space representation and other is the state space equation.

I'm getting the following errors:

Error using state_space

Too many input arguments.

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);

Error in Exc4_1 (line 27)

[tsim, wsim] = ode45(@state_space,time,w0,'options',mass,inertia,stiffness_f, stiffness_r, damping_f, damping_r, l_f, l_r);

How can I correct the code?

Answer 1

[Walter Roberson]

Do not attempt to use the obsolete syntax for adding extra variables to a function. Instead see http://www.mathworks.com/help/matlab/math/parameterizing-functions.html

[Varun Vijaykumar Vupparige]

Hey Walter

Could you please elaborate on this? I did not get my mistake.

[Ameer Hamza]

You are using a syntax of ode45, which has been obsolete for ages now. Even the archived documentation back to 2013a does not mention this syntax.

You can continue working with your current syntax of ode45, and change the function signature like this.

function dw = state_space(t,w,mass,inertia,stiffness_f,stiffness_r,damping_f,damping_r,l_f,l_r)
                         %^ add t here

However, as Walter recommended, you should switch to the new syntax. For that, leave the function signature unchanged but call the ode45 like this

[tsim, wsim] = ode45(@(t,w) state_space(w,mass,inertia,stiffness_f,stiffness_r,damping_f,damping_r,l_f,l_r),time,w0);