On Mon, Aug 08, 2011 at 04:44:15PM +0100, Babak wrote:
> Hi,
>
> I am new to this forum and this is actually the first time that I use
> Apache Commons Math.
> I would like use NelderMead class (in optimization.direct package) for
> minimizing the parameters of the function that I wrote (which
> implements MultivariateRealFunction).
>
> As you know, a call to optimize method in NelderMead should be caught
> for three different exceptions, namely FunctionEvaluationException,
> IllegalArgumentException and OptimizationException.
>
> However the last one (OptimizationException) has been apparently
> deprecated in version 2.2 (to be removed in 3.0). I am using the last
> version of Appache.Commons.Math which is apparently 2.2. (although I
> see a Javadoc CommonsMath 3.0 snapshot on the website which is
> confusing, as there is no sourcecode/jar for version 3.0) and since I
> am using Eclipse, I can clearly see that OptimizationException is
> visibly deprecated. However (as expected) the compiler does not
> complain about it and the program compiles and only at run time the
> following exception is thrown:
>
> Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError:
> org/apache/commons/math/optimization/OptimizationException
>
> It seems that OptimizationException class cannot be found! Usually,
> when a class is deprecated, it is still possible to use it (although
> not recommended). Beside, I have no choice but to use it (call to
> NelderMead.optimise requires to catch this exception). I greatly
> appreciate if you can please provide me with your feedbacks.
> Alternatively, I assume having the version 3.0 (if available) can
> solve my problem as well.
Are you sure that your classpath is the same for compilation and execution?
> Thank you,
>
> Babak
> ----------------------------------
> My code is simple and pretty straightforward as in the following:
>
> NelderMead apacheNelderMead = new NelderMead();
>
> MyMultivariateRealFunction minFunct = new
> MyMultivariateRealFunction();
>
> double[] start = new double[48];
> Arrays.fill(start, 0.1);
>
> try {
> minValue = apacheNelderMead.optimize(minFunct, GoalType.MINIMIZE,
> start);
>
> }
> catch ( FunctionEvaluationException e) {
> System.out.println(e);
> }
> catch (IllegalArgumentException e) {
> System.out.println(e);
> }
> catch (OptimizationException e) {
> System.out.println(e);
> }
It would help if you could provide a minimal but functional example, one
with which we can try to reproduce the problem.
Thanks,
Gilles
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