init commit

backprop/outputCouche.cpp

@@ -0,0 +1,66 @@
+#include "outputCouche.h"
+
+OutputCouche::OutputCouche() : Couche(){
+    //cout << "    Create empty PrevChange Matrix [in OutputCouche()]\n";
+    prevChange = SynapseMatrix();
+    //cout << "    Done\n";
+}
+
+OutputCouche::OutputCouche(const unsigned int nbr,const HiddenCouche *prev) : Couche(nbr,NULL){
+    prevCouche = prev;
+    if(prev)
+        prevChange = SynapseMatrix(prev->getNumber(),getNumber());
+    else
+        prevChange = SynapseMatrix();
+}
+
+void OutputCouche::setPrevCouche(const HiddenCouche *prev){
+    prevCouche = prev;
+    //cout << "    Create Synapse PrevChange [in OutputCouche.setPrevCouche(const HiddenCouche *prev)]\n";
+    prevChange = SynapseMatrix(prev->getNumber(),getNumber());
+    //cout << prevChange;
+    //cout << "    Done\n";
+}
+
+void OutputCouche::activate(){
+    unsigned int prevSize = prevCouche->getNumber();
+    unsigned int thisSize = getNumber();
+ 
+    double sum;
+    for(unsigned int i=0; i < thisSize ; ++i){
+        sum = 0.0;
+        for(unsigned int j=0; j < prevSize ; ++j){
+            sum += (*prevCouche)[j].getWeight() * (*prevCouche).getSynapse(j,i).getWeight();
+        }
+        (*this)[i] = util.sigmoid(sum);
+    }
+ 
+}
+
+void OutputCouche::backPropagate(const std::vector<double> deltaOutput){
+    unsigned int prevSize = prevCouche->getNumber();
+    unsigned int thisSize = getNumber();
+    double change;
+    for(unsigned int i=0; i < prevSize ; ++i){
+        for(unsigned int j=0; j < thisSize ; ++j){
+            change = (deltaOutput[j] * (*prevCouche)[i].getWeight());
+            (*prevCouche).getSynapse(i,j) = (*prevCouche).getSynapse(i,j).getWeight() + LEARNING_RATE*change + MOMENTUM*getChange(i,j);
+            prevChange(i,j) = change;
+        }
+    }
+}
+
+double OutputCouche::getChange(const unsigned int neurPrevCouche,const unsigned int neurThisCouche) const throw(const unsigned int, std::string){
+    return prevChange(neurPrevCouche,neurThisCouche).getWeight();
+}
+void OutputCouche::printMatrix(){
+    cout << prevChange;
+}
+
+OutputCouche& OutputCouche::operator=(const OutputCouche& c){
+    if(this!=&c){
+        Couche::operator=(c);
+        prevChange = c.prevChange;
+    }
+    return (*this);
+};