Not enough input arguments.

Hi everybody

I am trying to solve a couples ODE system, I wrote the code below but it has an error. I changed the code several times but it didnt work. How can I fix it???

thank you.

[Rik]

If you had pasted your code as code, others can actually run it.

[Mohammad Hasn Hashemi]

function Idot=motor(t,Z)
Zdot=zeros(2,1);
Rs=0.1;
Ls=0.5;
W=314;
B=0;
time=0:0.1:5;
% va=100*sin(W*t-B);
% vb=100*sin(W*t-B-(pi/2));

% Zdot(1)=(-Rs*Z(1)+100*sin(W*time-B))/Ls;
% Zdot(2)=(-Rs*Z(2)+100*sin(W*time-B-(pi/2)))/Ls;
Zdot(1)=(-Rs*Z(1)+100*sin(W))/Ls;
Zdot(2)=(-Rs*Z(2)+100*sin(W-(pi/2)))/Ls;
end


clc
clear

t=[0,5];
x0=0;
xdot0=5;
z0=[x0,xdot0];

[T,Z]=ode45(motor,t,z0)
plot(T,Z)

[Walter Roberson]

function Idot=motor(t,Z)

output should be Zdot not Idot

Answer 1

[Alan Stevens]

More like this:

t=0:0.1:5;
x0=0;
xdot0=5;
z0=[x0,xdot0];

[T,Z]=ode45(@motor,t,z0);   %  Note @motor, not just motor.
plot(T,Z)

function Zdot=motor(t,Z)
Zdot=zeros(2,1);
Rs=0.1;
Ls=0.5;
W=314;
%B=0;
Zdot(1)=(-Rs*Z(1)+100*sin(W*t))/Ls;
Zdot(2)=(-Rs*Z(2)+100*sin(W*t-(pi/2)))/Ls;
end

(code executed by @Rik)

[Mohammad Hasn Hashemi]

Output argument "Idot" (and maybe others) not assigned during call to "motor".

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 motor2 (line 9)
[T,Z]=ode45(@motor,t,z0)

Still having Error

[Alan Stevens]

I corrected the other errors! Copy and paste the coding. Look carefully at the other lines.