Impala Documentation

00001 #ifndef Impala_Core_Vector_HistogramNormalization_h
00002 #define Impala_Core_Vector_HistogramNormalization_h
00003 
00004 #include "Core/Vector/VectorSet.h"
00005 #include "Core/Vector/DivAssign.h"
00006 #include "Core/Vector/Sum.h"
00007 #include "Core/Vector/ElemMax.h"
00008 
00009 namespace Impala
00010 {
00011 namespace Core
00012 {
00013 namespace Vector
00014 {
00015 
00016 
00017 template <class ArrayT>
00018 inline void
00019 HistogramNormalization(VectorSet<ArrayT>* vs, bool normWeight, bool* filter)
00020 {
00021     for (int i=0 ; i<vs->Size() ; i++)
00022     {
00023         if (filter && (!filter[i]))
00024             continue;
00025         typename VectorSet<ArrayT>::VectorT v = vs->GetVector(i, true);
00026         typename VectorSet<ArrayT>::ElemT factor;
00027         factor = (normWeight) ? Sum(v) : ElemMax(v);
00028         if (factor == 0)
00029             v = 0;
00030         else
00031             DivAssign(v, factor);
00032     }
00033 }
00034 
00035 } // namespace Vector
00036 } // namespace Core
00037 } // namespace Impala
00038 
00039 #endif
HistogramNormalization.h
