Problem running old *.m file in Matlab 7.10.0

hello!

I'm new to this forum. I have matlab program that was written in Matlab 5.2. i would like to upgrade that program but first i must get running the original version.

_global a_bar b_bar acc_ratio t_start menu1 z Acc I_frq kg a=0.8552; b=0.8552; Alfa=a/b; fill_level=0.5; Gama=(0.7726259-1.304727/Alfa)*(fill_level)^2+(-1.780896+1.542048/Alfa)*(fill_level)+1; b_bar=b*Gama; a_bar=b_bar*Alfa; t=[0:0.1:40]; z=size(t,2); acc_ratio=0.05;

t_start=1;

Y=[0;0];

options=odeset('RelTol',{1e-6},'AbsTol',{1e-6});__ITALIC TEXT_

 i have problem with following part:

>> [t,dif]=ode45('equ_mot',t,Y,options); ??? Subscripted assignment dimension mismatch.

Error in ==> equ_mot at 14 elliptical(2,1)=(-a*cos(Y(1))*acc+0.5*Y(2)^2*(a^2-b^2)*sin(2*Y(1))-9.81*b*sin(Y(1)))/(a^2*(cos(Y(1)))^2+b^2*sin((Y(1)))^2); Error in ==> odearguments at 110 f0 = feval(ode,t0,y0,args{:}); % ODE15I sets args{1} to yp0.

Error in ==> ode45 at 173 [neq, tspan, ntspan, next, t0, tfinal, tdir, y0, f0, odeArgs, odeFcn, ...

could some, please, tell me how to start solving my problem?

thx :D

Answer 1

[Aurelien Queffurust]

Apply this solution:

Section 5: Subscripted Assignment Dimension Mismatch