Impala Documentation

double Impala::Core::Training::AreaUnderRocCurve::SubCompute ( Table::ScoreTable * table ) [inline, private]

Definition at line 43 of file AreaUnderRocCurve.h.

References Impala::Core::Table::TableTem< Col1T, Col2T, Col3T, Col4T, Col5T, Col6T, Col7T, Col8T, Col9T >::Get1(), Impala::Core::Table::AnnotationTable::IsPositive(), Impala::Core::Training::Evaluation::mAnnotation, and Impala::Core::Table::Table::Size().

Referenced by Compute(), and ComputeReverse().

00044     {
00045         int pos = 0;
00046         int neg = 0;
00047         int area = 0;
00048         for (int i=0 ; i<table->Size() ; i++)
00049         {
00050             Quid q = table->Get1(i);
00051             if (mAnnotation->IsPositive(q))
00052             {
00053                 ++pos;
00054             }
00055             else //if(mAnnotation->IsNegative(q))
00056             {
00057                 area += pos;
00058                 ++neg;
00059             }
00060         }
00061         return (double)area / (double)(pos*neg);
00062     }

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