git-svn-id: file:///home/svn/opt_utilities@110 ed2142bd-67ad-457f-ba7c-d818d4011675

1 files changed, 64 insertions, 0 deletions

diff --git a/vmodels/beta1d.hpp b/vmodels/beta1d.hpp
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+++ b/vmodels/beta1d.hpp
@@ -0,0 +1,64 @@
+#ifndef VBETA_MODEL_H_
+#define VBETA_MODEL_H_
+#define OPT_HEADER
+#include <core/fitter.hpp>
+#include <misc/optvec.hpp>
+#include <cmath>
+
+namespace opt_utilities
+{
+  template <typename T>
+  class beta1d
+    :public model<optvec<T>,optvec<T>,optvec<T>,std::string>
+  {
+    typedef optvec<T> Tv;
+  private:
+    beta1d<T>* do_clone()const
+    {
+      return new beta1d<T>(*this);
+    }
+
+    const char* do_get_type_name()const
+    {
+      return "1d surface brightness beta model";
+    }
+  public:
+    beta1d()
+    {
+      this->push_param_info(param_info<Tv>("S0",1));
+      this->push_param_info(param_info<Tv>("rc",10));
+      this->push_param_info(param_info<Tv>("beta",2./3.));
+      this->push_param_info(param_info<Tv>("bkg",0));
+    }
+
+  public:
+    Tv do_eval(const Tv& x,const Tv& param)
+    {
+      Tv result(x.size());
+      T S0=get_element(param,0);
+      T r_c=get_element(param,1);
+      T beta=get_element(param,2);
+      T bkg=get_element(param,3);
+      
+      //return x*get_element(param,0)+get_element(param,1);
+      for(size_t i=0;i!=x.size();++i)
+	{
+	  
+	  result[i]=bkg+S0*pow(1+(x[i]*x[i])/(r_c*r_c),-3*beta+static_cast<T>(.5));
+
+	}
+      return result;
+    }
+
+  private:
+    std::string do_get_information()const
+    {
+      return "";
+    }
+  };
+}
+
+
+
+#endif
+//EOF