Re: fsolve shows repeated results

[Fausto Arinos de A. Barbuto]

On 16-10-2015 18:07, John Guin wrote:
> You could write your loop like this:
>
> function raizes3
>
>      format long;
>      options =  optimset('TolX',1.0e-15,'TolFun',1.0e-15);
>
> [x,fval] = fsolve(@f, 0.10000,options)
> fprintf('\n');
> [x,fval] = fsolve(@f, 0.60000,options)
> fprintf('\n');
> [x,fval] = fsolve(@f, 1.10000,options)
> fprintf('\n');
> [x,fval] = fsolve(@f, 1.60000,options)
> fprintf('\n');
> [x,fval] = fsolve(@f, 2.10000,options)
> fprintf('\n');

[...]

> It’s just odd looking in that the roots have the same values for different 
> inputs.

That's because (I reckon) I passed a very small tolerance to fsolve(). Had I 
used a
tolerance of, say, 1.0e-06 and things would be quite different (and I tried 
that).

> Does this make a little more sense now?

Yes it does, John. Thanks a lot.

Fausto