Changeset 2697

Timestamp:

Feb 28, 2012, 5:02:29 PM (11 years ago)

Author:

Peter

Message:

use nan to flag that area is not updated rather than -1 as before since the actual area can be -1 as we allow negative weights

File:

• trunk/yat/statistics/ROC.cc (modified) (5 diffs)

trunk/yat/statistics/ROC.cc

@@ -57 +57 @@
     else
       w_neg_+=w;
-    area_=-1;
+    area_ = std::numeric_limits<double>::quiet_NaN();
   }
 
@@ -63 +63 @@
   double ROC::area(void)
   {
-    if (area_==-1){
+    if (std::isnan(area_)){
       AUC auc(false);
       area_=auc.score(multimap_);
@@ -147 +147 @@
   {
     double area(area_);
-    if (area_==-1){
+    if (std::isnan(area)){
       AUC auc(false);
       area = auc.score(multimap_);
@@ -173 +173 @@
   {
     double area(area_);
-    if (area_==-1){
+    if (std::isnan(area)){
       AUC auc(false);
       area = auc.score(multimap_);
@@ -187 +187 @@
   void ROC::reset(void)
   {
-    area_=-1;
+    area_ = std::numeric_limits<double>::quiet_NaN();
     has_ties_ = false;
     w_pos_=0;