[Bugzilla] [Bug 9231] Samuel GOUGEON has changed component

[bugzilla.admin at scilab.org]

http://bugzilla.scilab.org/show_bug.cgi?id=9231
--------- Bug Summary -----------
fsolve() produces wrong answer for certain variable values

---------- Changed by ------------
sgougeon at free.fr

---------- What changed ----------
component


Samuel GOUGEON <sgougeon at free.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|Scilab                      |Numerical Math

--- Comment #4 from Samuel GOUGEON <sgougeon at free.fr> ---
(In reply to Samuel GOUGEON from comment #1)
> Another simple failing case:
> 
> * What's the root of exp(x)*(3-x) - 3 = 0 ? : 0 and 2.8214394... Yet:
> function d = test(x)
>   d = exp(x).*(3-x) - 3
> endfunction
> [x, v, info] = fsolve(2, test)
> 
> // yielding
> -->[x, v, info] = fsolve(2,test)
>  info  =
>     1.         // meaning: algorithm estimates that the relative error between x and the solution is at most tol.
>  v  =
>     4.3890561  // quite far from 0 !!
>  x  =
>     2.  
> 
> The diagnosis given by info looks wrong!

We still get these erroneous result and message in Scilab 6.0.1 / win7 64 bits

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