R help - Apr 2003 - n.iter in simplex()

Dear R users,

Is anyone familiar with the "n.iter" argument of the simplex()
function
(in the boot package)?  It seems it doesn't have an effect no matter what
value I set it ...

I'm trying to solve a linear programming problem and running into the
problem of

simplex.object$solved = 0

or

"A value of 0 indicates that the maximum number of iterations was reached
without termination of the second stage. This may indicate an unbounded
function or simply that more iterations are needed."  (Quoted from R
online help)

I'm pretty sure that my objective function is bounded.  So I tried to set
different values for "n.iter" (I even tried to set it equal to 0 and
-1),
but no matter what values I set, I always got the same result.  Could
anyone give me some hint about what's going on?  Thanks in advance.

Regards,

Ji

Ji Zhu wrote:
> Dear R users,
> 
> Is anyone familiar with the "n.iter" argument of the simplex()
function
> (in the boot package)?  It seems it doesn't have an effect no matter
what
> value I set it ...
> 
> I'm trying to solve a linear programming problem and running into the
> problem of
> 
> simplex.object$solved = 0
> 
> or
> 
> "A value of 0 indicates that the maximum number of iterations was
reached
> without termination of the second stage. This may indicate an unbounded
> function or simply that more iterations are needed."  (Quoted from R
> online help)
> 
> I'm pretty sure that my objective function is bounded.  So I tried to
set
> different values for "n.iter" (I even tried to set it equal to 0
and -1),
> but no matter what values I set, I always got the same result.  Could
> anyone give me some hint about what's going on?  Thanks in advance.
Well, it works for the example, at least. Play around with it.
Please specify more details, we cannot help otherwise.

Uwe Ligges