1 files changed, 67 insertions, 0 deletions
diff --git a/vmodels/bpl.hpp b/vmodels/bpl.hpp
new file mode 100644
index 0000000..e99efe3
--- /dev/null
+++ b/vmodels/bpl.hpp
@@ -0,0 +1,67 @@
+#ifndef BROKEN_POWER_LAW_MODEL_H_
+#define BROKEN_POWER_LAW_MODEL_H_
+#define OPT_HEADER
+#include <core/fitter.hpp>
+#include <cmath>
+#include <misc/optvec.hpp>
+
+namespace opt_utilities
+{
+  template <typename T>
+  class bpl1d
+    :public model<optvec<T>,optvec<T>,optvec<T>,std::string>
+  {
+  private:
+    bpl1d* do_clone()const
+    {
+      return new bpl1d<T>(*this);
+    }
+
+    const char* do_get_type_name()const
+    {
+      return "broken power law";
+    }
+  public:
+    bpl1d()
+    {
+      this->push_param_info(param_info<optvec<T> >("bpx",1));
+      this->push_param_info(param_info<optvec<T> >("bpy",1));
+      this->push_param_info(param_info<optvec<T> >("gamma1",1));
+      this->push_param_info(param_info<optvec<T> >("gamma2",1));
+    }
+
+    optvec<T> do_eval(const optvec<T>& x,const optvec<T>& param)
+    {
+      T x_b=get_element(param,0);
+      T f_b=get_element(param,1);
+      T gamma1=get_element(param,2);
+      T gamma2=get_element(param,3);
+      
+      optvec<T> result(x.size());
+      for(int i=0;i<result.size();++i)
+	{
+	  if(x[i]<x_b)
+	    {
+	      result[i]=f_b*pow(x[i],gamma1)/pow(x_b,gamma1);
+	    }
+	  else
+	    {
+	      result[i]=f_b*pow(x[i],gamma2)/pow(x_b,gamma2);
+	    }
+	}
+      return result;
+    }
+    
+
+  private:
+    std::string do_get_information()const
+    {
+      return "";
+    }
+  };
+}
+
+
+
+#endif
+//EOF