1 files changed, 84 insertions, 0 deletions
diff --git a/vmodels/dbeta1d.hpp b/vmodels/dbeta1d.hpp
new file mode 100644
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--- /dev/null
+++ b/vmodels/dbeta1d.hpp
@@ -0,0 +1,84 @@
+/**
+   \file dbeta1d.hpp
+   \brief 1d beta model
+   \author Junhua Gu
+ */
+
+
+#ifndef V2BETA_MODEL_H_
+#define V2BETA_MODEL_H_
+#define OPT_HEADER
+#include <core/fitter.hpp>
+#include <misc/optvec.hpp>
+#include <cmath>
+
+namespace opt_utilities
+{
+  template <typename T>
+  class dbeta1d
+    :public model<optvec<T>,optvec<T>,optvec<T>,std::string>
+  {
+    typedef optvec<T> Tv;
+  private:
+    dbeta1d<T>* do_clone()const
+    {
+      return new dbeta1d<T>(*this);
+    }
+
+    const char* do_get_type_name()const
+    {
+      return "1d surface brightness 2beta model";
+    }
+  public:
+    dbeta1d()
+    {
+      this->push_param_info(param_info<Tv>("S01",1));
+      this->push_param_info(param_info<Tv>("rc1",10));
+      this->push_param_info(param_info<Tv>("beta1",2./3.));
+      
+      this->push_param_info(param_info<Tv>("S02",1));
+      this->push_param_info(param_info<Tv>("rc2",10));
+      this->push_param_info(param_info<Tv>("beta2",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 S01=get_element(param,0);
+      T r_c1=get_element(param,1);
+      T beta1=get_element(param,2);
+
+      T S02=get_element(param,3);
+      T r_c2=get_element(param,4);
+      T beta2=get_element(param,5);
+
+      T bkg=get_element(param,6);
+      
+      //return x*get_element(param,0)+get_element(param,1);
+      for(size_t i=0;i!=x.size();++i)
+	{
+	  
+	  result[i]=bkg
+	    +S01*pow(1+(x[i]*x[i])/(r_c1*r_c1),-3*beta1+static_cast<T>(.5))
+	    +S02*pow(1+(x[i]*x[i])/(r_c2*r_c2),-3*beta2+static_cast<T>(.5));
+
+	}
+      return result;
+    }
+
+  private:
+    std::string do_get_information()const
+    {
+      return "";
+    }
+  };
+}
+
+
+
+#endif
+//EOF