C++ (Cpp) realvec::det 예제들

예제 #1

파일: QGMMModel.cpp 프로젝트: GanAlps/Extracting-Features-from-audio

mrs_real
QGMMModel::deltaBIC(realvec C1, mrs_natural N1, realvec C2, mrs_natural N2, realvec C, mrs_real lambda)
{
	//matrices should be square and equal sized
	if(C1.getCols() != C2.getCols() && C1.getCols() != C.getCols() &&
		C1.getCols()!= C1.getRows())
	{
		MRSERR("QGMMModel:deltaBIC: matrices should all be squared and equal sized...");
		return MAXREAL; //just a way to sinalize the above error... [!]
	}

	mrs_real res;
	mrs_real N = (mrs_real)(N1 + N2);
	mrs_real d = (mrs_real)C1.getCols();


	res = N * log(C.det());
	res -= (mrs_real)N1 * log(C1.det());
	res -= (mrs_real)N2 * log(C2.det());
	res *= 0.5f;

	res -= 0.5f * lambda * (d + 0.5f*d*(d+1.0f))* log(N);

	return res;
}