Re: fsolve shows repeated results

[Fausto Arinos de A. Barbuto]

On 16-10-2015 17:47, Steven Davis wrote:
> Fausto,
>
> I'm just picking up Octave after having used Matlab years ago, so I'm not 
> really an expert,
> you'll want to check this for yourself.
>
> The lines:
>
> xi = [0.1:0.5:5.0];
>
>      for xguess = xi
>
> Tell Octave to make an array xi that is 
> [0.1,0.6,1.1,1.6,2.1,2.6,3.1,3.6,4.1,4.6] and then run a
> for-loop for each of those values.  Since you are giving it 10 different 
> starting points, it is
> naturally going to return different values for a periodic function like 
> x*tan(x).
>
> Steven

Steven,

As Doug Stewart keenly pointed out, my original code is not at all too clever. 
I'm
working on a better scheme, now that I figured out what the flaw was. You're 
right
too -- array values such as 1.6, 2.1, 2.6 etc are all starting values that end 
up
producing the same root, 4.603... I should've seen this /before/ writing to this
list. My bad.

Thanks for your help.

Fausto