From 784f745b792b45d1cce283fac3d5b0fcc6946adf Mon Sep 17 00:00:00 2001
From: astrojhgu <astrojhgu@ed2142bd-67ad-457f-ba7c-d818d4011675>
Date: Sat, 19 Feb 2011 01:46:03 +0000
Subject: git-svn-id: file:///home/svn/opt_utilities@177
 ed2142bd-67ad-457f-ba7c-d818d4011675

---
 pre_estimaters/lin1d_estimater.hpp | 52 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 pre_estimaters/lin1d_estimater.hpp

(limited to 'pre_estimaters')

diff --git a/pre_estimaters/lin1d_estimater.hpp b/pre_estimaters/lin1d_estimater.hpp
new file mode 100644
index 0000000..0a76df3
--- /dev/null
+++ b/pre_estimaters/lin1d_estimater.hpp
@@ -0,0 +1,52 @@
+#ifndef LIN1D_ESTIMATER
+#define LIN1D_ESTIMATER
+#include "pre_estimater.hpp"
+#include <misc/optvec.hpp>
+#include <models/lin1d.hpp>
+#include <vector>
+
+namespace opt_utilities
+{
+  template <typename T>
+  class lin1d_estimater
+    :public pre_estimater<T,T,std::vector<T>,std::string>
+  {
+  public:
+    lin1d_estimater()
+    {
+      this->set_model_id("1d linear model");
+    }
+
+    lin1d_estimater<T>* do_clone()const
+    {
+      return new lin1d_estimater<T>(*this);
+    }
+
+    void do_estimate(const data_set<T,T>& d,model<T,T,std::vector<T>,std::string>& m)const
+    {
+      T n=d.size();
+      T sy=0;
+      T sxx=0;
+      T sx=0;
+      T sxy=0;
+      
+      for(int i=0;i<d.size();++i)
+	{
+	  sy+=d.get_data(i).get_y();
+	  sxx+=d.get_data(i).get_x()*d.get_data(i).get_x();
+	  sx+=d.get_data(i).get_x();
+	  sxy+=d.get_data(i).get_x()*d.get_data(i).get_y();
+	}
+      T b=(sy*sxx-sx*sxy)/(n*sxx-sx*sx);
+      T k=(n*sxy-sx*sy)/(n*sxx-sx*sx);
+
+      m.set_param_value("k",k);
+      m.set_param_value("b",b);
+      
+    }
+  };
+}
+
+
+
+#endif
-- 
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