public static NMatrix Softmax(NMatrix matrix)
{
var maxElem = matrix.Max();
var expMatrix = matrix.Map(
(elem) => { return(Math.Exp(elem - maxElem)); });
double expSum = 0;
for (uint i = 0; i < expMatrix.Row * expMatrix.Col; i++)
{
expSum += expMatrix[i];
}
var resultMatrix = new NMatrix(expMatrix);
for (uint i = 0; i < resultMatrix.Row * resultMatrix.Col; i++)
{
resultMatrix[i] = expMatrix[i] / expSum;
}
return(resultMatrix);
}