From ffd178e0bd72562a3c2cff9747b6e656edc881dc Mon Sep 17 00:00:00 2001
From: Aaron LI <aaronly.me@gmail.com>
Date: Fri, 27 May 2016 22:47:24 +0800
Subject: Add mass_profile tools

* These tools are mainly use to calculate the total gravitational mass
  profile, as well as the intermediate products (e.g., surface
  brightness profile fitting, gas density profile, NFW fitting, etc.)
* There are additional tools for calculating the luminosity and flux.
* These tools mainly developed by Junhua GU, and contributed by
  Weitian (Aaron) LI, and Zhenghao ZHU.
---
 mass_profile/constrained_dbeta.hpp | 80 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100644 mass_profile/constrained_dbeta.hpp

(limited to 'mass_profile/constrained_dbeta.hpp')

diff --git a/mass_profile/constrained_dbeta.hpp b/mass_profile/constrained_dbeta.hpp
new file mode 100644
index 0000000..24a1ebb
--- /dev/null
+++ b/mass_profile/constrained_dbeta.hpp
@@ -0,0 +1,80 @@
+#ifndef CONSTRAINED_DBETA
+#define CONSTRAINED_DBETA
+#include "projector.hpp"
+
+
+namespace opt_utilities
+{
+  template <typename T>
+  class constrained_dbeta
+    :public model<std::vector<T>,std::vector<T>,std::vector<T> >
+  {
+  public:
+    constrained_dbeta()
+    {
+      this->push_param_info(param_info<std::vector<T>,std::string>("n01",1));
+      this->push_param_info(param_info<std::vector<T>,std::string>("beta1",.66));
+      this->push_param_info(param_info<std::vector<T>,std::string>("rc1",100));
+
+      this->push_param_info(param_info<std::vector<T>,std::string>("n02",1));
+      this->push_param_info(param_info<std::vector<T>,std::string>("beta2",.67));
+      this->push_param_info(param_info<std::vector<T>,std::string>("rc2",110));
+      
+    }
+
+  public:
+    constrained_dbeta<T>* do_clone()const
+    {
+      return new constrained_dbeta<T>(*this);
+    }
+
+    std::vector<T> do_eval(const std::vector<T> & x,
+			   const std::vector<T>& p)
+    {
+      T n01=std::abs(p[0]);
+      T beta1=p[1];
+      T rc1=p[2];
+
+      T n02=std::abs(p[3]);
+      T beta2=p[4];
+      T rc2=p[5];
+
+      
+
+      std::vector<T> result(x.size()-1);
+      for(int i=1;i<x.size();++i)
+	{
+	  T xi=(x[i]+x[i-1])/2;
+	  T yi=0;
+	  yi=n01*pow(1+xi*xi/rc1/rc1,-3./2.*beta1)+n02*pow(1+xi*xi/rc2/rc2,-3./2.*beta2);
+	  result[i-1]=yi;
+	}
+      return result;
+    }
+
+    bool do_meets_constraint(const std::vector<T>& p)const
+    {
+      if(p.size()!=6)
+	{
+	  cerr<<p.size()<<endl;
+	  cerr<<this->get_num_params()<<endl;
+	  assert(0);
+	}
+      
+      T rc1=p.at(2);
+      T rc2=p.at(5);
+      if(rc2>rc1)
+	{
+	  return true;
+	}
+      else
+	{
+	  cerr<<rc2<<"\t"<<rc1<<endl;
+	  cerr<<"***"<<endl;
+	  return false;
+	}
+    }
+  };
+}
+
+#endif
-- 
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