I have this error!!! ode45

Hello! I have an erroe when using the fuction ode45 this is my code;

clc;
clear all;
close all;
ti=0; h=0.0025; tf=5;
ts=(ti:h:tf);
[renglones,columnas]=size(ts);
opciones=odeset('RelTol',1e-06,'AbsTol',1e-06,'InitialStep',h,'MaxStep',h);
cond_iniciales=1;
[t,F]=ode45('filtro',ts,cond_iniciales,opciones);
Fp=filtro(t,F);
plot(t,Fp)

And this is the function:

function xp=filtro(t,x)
  u=Cos(t);
  a=3;
  b=3;
  xp=-a*x+b*u;
end

And the error is:

Error using nargin Error: File: filtroC.m Line: 4 Column: 13 Function with duplicate name "filtroC" cannot be defined.

Error in odearguments (line 60) if (nargin(ode) == 2)

Error in ode45 (line 115) odearguments(FcnHandlesUsed, solver_name, ode, tspan, y0, options, varargin);

Error in pureba (line 10) [t,F]=ode45('filtroC',ts,cond_iniciales,opciones);

[James Tursa]

You posted filtro.m twice instead of posting filtroC.m

[Jan]

Note: Do not use a string to define the function to be integrated: "ode45('filtroC', ...". This is outdated for 15 years now. Use a function handle as shown in the examples: "ode45(@filtroC, ...".

Show us the contents of "filtroC.m".

Answer 1

[Walter Roberson]

Your file filtroC has two lines similar to

function outputs = filtroC(arguments)

The second of the two is on line 4 of the file.

[Manuel Martinez]

Sorry, I wrote it wrong, that is the correct

[Walter Roberson]

Your error message is

Error in pureba (line 10) [t,F]=ode45('filtroC',ts,cond_iniciales,opciones);

which calls upon filtroC not filtro