nervecell.cpp

神经网络的结构实现

#include "NerveCell.h"
#include <math.h>

int NerveCell::count = 0;

double Sigmoid(double x)
{
	return double(1/(1+exp(-x)));
}

void NerveCell::Initial(Layer* layer)
{
	n=0;
	input.clear();
	weight.clear();
	lastweight.clear();

	if (hidden)
	{
		
		return;
	}
	else
	{
		for (int i=0;i<layer->num;i++)
		{
			Connect((*layer)[i]);
		}
	}
	
}

Vtype NerveCell::CalcValue()
{
	if (hidden)
	{
		value = 1;
	}
	else
	{
		if (0 == n)
		{
		}
		else
		{
			value = 0;
			for(int i=0;i<input.size();i++)
			{
				value += weight[i]*input[i]->GetValue();
			}
			value = Sigmoid(value);
		}
	}
	update = true;
	return value;
}

NerveCell* Layer::operator[](int i)
{
	return celllist[i]->head;
}

void Layer::DelCell(NerveCell* cell)//delete the cell
{
	vector<NerveCellList*>::iterator iter=celllist.begin();
	
	for (int i=0;i<celllist.size();i++)
	{
		if(celllist[i]->head == cell)
		{
			celllist.erase(iter);
			break;
		}
		iter++;
	}
}