git-svn-id: file:///home/svn/opt_utilities@1 ed2142bd-67ad-457f-ba7c-d818d4011675

1 files changed, 60 insertions, 0 deletions

diff --git a/models/beta2d.hpp b/models/beta2d.hpp
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+++ b/models/beta2d.hpp
@@ -0,0 +1,60 @@
+#ifndef BETA_MODEL2d_H_
+#define BETA_MODEL2d_H_
+#include <core/fitter.hpp>
+#include <cmath>
+#include <cassert>
+#include "vecn.hpp"
+
+
+namespace opt_utilities
+{
+  
+  template <typename T>
+  class beta2d
+    :public model<T,vecn<T,2>,std::vector<T>,std::string>
+  {
+  private:
+    model<T,vecn<T,2>,std::vector<T> >* do_clone()const
+    {
+      return new beta2d<T>(*this);
+    }
+  public:
+    beta2d()
+    {
+      this->push_param_info(param_info<std::vector<T> >("S0",1));
+      this->push_param_info(param_info<std::vector<T> >("rc1",100));
+      this->push_param_info(param_info<std::vector<T> >("rc2",100));
+      this->push_param_info(param_info<std::vector<T> >("rho",0));
+      this->push_param_info(param_info<std::vector<T> >("x0",100));
+      this->push_param_info(param_info<std::vector<T> >("y0",100));
+      this->push_param_info(param_info<std::vector<T> >("beta",2./3.));
+      this->push_param_info(param_info<std::vector<T> >("bkg",0));
+    }
+
+
+    T do_eval(const vecn<T,2>& xy,const std::vector<T>& param)
+    {
+      T S0=get_element(param,0);
+      T rc1=get_element(param,1);
+      T rc2=get_element(param,2);
+      T rho=get_element(param,3);
+      T x0=get_element(param,4);
+      T y0=get_element(param,5);
+      T beta=get_element(param,6);
+      T bkg=get_element(param,7);
+      T x=xy[0];
+      T y=xy[1];
+
+      T r=(x-x0)*(x-x0)/(rc1*rc1)+(y-y0)*(y-y0)/(rc2*rc2)
+	-2*rho*(x-x0)*(y-y0)/(rc1*rc2);
+      r=r<0?0:r;
+      
+      return bkg+S0*pow(1+r,-3*beta+static_cast<T>(.5));
+    }
+  };
+};
+
+
+
+#endif
+//EOF