Changeset 102 for trunk/src/ROC.cc

Timestamp:

Jun 15, 2004, 11:40:52 AM (19 years ago)

Author:

Peter

Message:

Fixed bug in interface between InputRanker? & ROC

File:

• trunk/src/ROC.cc (modified) (3 diffs)

trunk/src/ROC.cc

@@ -17 +17 @@
   
     : Score(), value_(), nof_pos_(0), minimum_size_(10), area_(-1)
-
-       
+    
   {
     for (unsigned int i=0; i<target.size(); i++){
@@ -32 +31 @@
   }
 
+  ROC::ROC() 
+    : Score(), value_(), nof_pos_(0), minimum_size_(10), area_(-1)
+       
+  {
+  }
+
+
+  double ROC::score(const gslapi::vector& target, const gslapi::vector& value)
+  {
+    for (unsigned int i=0; i<target.size(); i++){
+      int targ=static_cast<int>(target(i));
+      std::pair<int, double> tmp(targ, value(i));
+      value_.push_back(tmp);
+      if (targ==1)
+        nof_pos_++;
+    }
+    sort(value_.begin(),value_.end(),
+         pair_value_compare<int,double>());
+    double area_=0;
+    for (unsigned int i=0; i<value_.size(); i++)
+      if (value_[i].first==1)
+        area_+=i;
+    // Normalizing the area to 0-1
+    area_ = (area_/nof_pos_ - (nof_pos_ - 1)/2 )/(value_.size() - nof_pos_);
+
+    return area_;
+  }
 
   double ROC::score()
   {
-    using namespace std;
     if (area_==-1){
       double area_=0;
@@ -62 +87 @@
 
 
-  double ROC::get_p_approx(const double area) 
+  double ROC::get_p_approx(const double area) const
   {
     double x = area - 0.5;