1 files changed, 61 insertions, 0 deletions
diff --git a/vmodels/pl_bkg.hpp b/vmodels/pl_bkg.hpp
new file mode 100644
index 0000000..3b787b9
--- /dev/null
+++ b/vmodels/pl_bkg.hpp
@@ -0,0 +1,61 @@
+/**
+   \file pl_bkg.hpp
+   \brief power law model
+   \author Junhua Gu
+ */
+
+
+#ifndef POWER_LAW_BKG_MODEL_H_
+#define POWER_LAW_BKG_MODEL_H_
+#define OPT_HEADER
+#include <core/fitter.hpp>
+#include <cmath>
+#include <misc/optvec.hpp>
+
+namespace opt_utilities
+{
+  template <typename T>
+  class pl_bkg
+    :public model<optvec<T>,optvec<T>,optvec<T>,std::string>
+  {
+  private:
+    pl_bkg* do_clone()const
+    {
+      return new pl_bkg<T>(*this);
+    }
+
+    const char* do_get_type_name()const
+    {
+      return "power law with bkg";
+    }
+  public:
+    pl_bkg()
+    {
+      this->push_param_info(param_info<optvec<T> >("Ampl",1));
+      this->push_param_info(param_info<optvec<T> >("gamma",1));
+      this->push_param_info(param_info<optvec<T> >("bkg",1));
+    }
+
+    optvec<T> do_eval(const optvec<T>& x,const optvec<T>& param)
+    {
+      T A=get_element(param,0);
+      T gamma=get_element(param,1);
+      T bkg=get_element(param,2);
+      return A*pow(x,gamma)+bkg;
+    }
+
+  private:
+    std::string do_get_information()const
+    {
+#ifdef WITH_OPT_DOC
+#include <model_doc/pl_bkg.info>
+#endif
+      return "";
+    }
+  };
+}
+
+
+
+#endif
+//EOF