error with function ode45

Hello,I created this function and file but I'm getting this error:

not sure what I'm doing wrong. Any help will be greatly appreciated.

Error using odearguments

When the first argument to ode45 is a function handle, the tspan argument must have at least two elements.

Error in ode45 (line 107)

odearguments(odeIsFuncHandle,odeTreatAsMFile, solver_name, ode, tspan, y0, options, varargin);

Error in blasius_solution (line 6)

[eta, f] = ode45 (@mufun, 0.5, [0; 0; guess]);

function dfdeta = mufun (eta, f)
dfdeta = [f(2); f(3); -0.5 * f(1) * f(3)];
end

clear all;
close all;

guess = 0.1;
    
[eta, f] = ode45 (@mufun, 0.5, [0; 0; guess]);

plot(f, eta);

Answer 1

[John D'Errico]

You need to tell the ODEsolver FROM where, TO where will it integrate? So will the integration be, perhaps FROM 0 to 0.5?

All you have passed in is a scalar, the number 0.5. Should it be able to guess?

[Cesar Cardenas]

finally, I could solve it. thanks