git-svn-id: file:///home/svn/opt_utilities@54 ed2142bd-67ad-457f-ba7c-d818d4011675

1 files changed, 73 insertions, 0 deletions

diff --git a/example/test_optimizer.cpp b/example/test_optimizer.cpp
new file mode 100644
index 0000000..99b9ec2
--- /dev/null
+++ b/example/test_optimizer.cpp
@@ -0,0 +1,73 @@
+#include <core/optimizer.hpp>
+#include <methods/powell/powell_method.hpp>
+#include <methods/aga/aga.hpp>
+#include <vector>
+#include <iostream>
+
+
+//declear a class derived from func_obj
+class foo
+  :public opt_utilities::func_obj<double,std::vector<double> >
+//                              ^^^^^^^^double is the return type
+//                                      vector is the parameter type
+{
+  double do_eval(const std::vector<double>& p)
+  {
+    double result=0;
+    for(int i=0;i<p.size();++i)
+      {
+	result+=p[i]*p[i];
+      }
+    return result;
+  }
+
+  foo* do_clone()const
+  {
+    return new foo(*this);//default implement of the do_clone
+  }
+};
+
+
+int main()
+{
+  //define an optimizer object
+  opt_utilities::optimizer<double,std::vector<double> > op;
+  //set the optimization method
+  op.set_opt_method(opt_utilities::powell_method<double,std::vector<double> >());
+  //attach the object function
+  op.set_func_obj(foo());
+
+  //define the starting point
+  std::vector<double> p(3);
+  p[0]=p[1]=p[2]=10;
+  
+  //set the starting point
+  op.set_start_point(p);  
+  std::cout<<"starting optimization from:"<<
+    p[0]<<" "<<p[1]<<" "<<p[2]<<std::endl;
+
+  //set the precision
+  op.set_precision(1E-6);
+  //perform the optimization
+  p=op.optimize();
+
+  //output the result
+  std::cout<<"optimization result:"<<
+    p[0]<<" "<<p[1]<<" "<<p[2]<<std::endl;
+
+  //Let's change another method
+  op.set_opt_method(opt_utilities::aga_method<double,std::vector<double> >());
+  //define the lower and upper limit
+  p[0]=p[1]=p[2]=-10;
+  op.set_lower_limit(p);
+  p[0]=p[1]=p[2]=10;
+  op.set_upper_limit(p);
+  //set the start point
+  op.set_start_point(p);
+  //set precision
+  op.set_precision(1E-10);
+  //start optimize
+  p=op.optimize();
+  std::cout<<"optimization result:"<<
+    p[0]<<" "<<p[1]<<" "<<p[2]<<std::endl;
+}