Method gradient

dependency/densecrf/examples/test_pairwise.cpp:46–52

		p_.setKernelParameters( v );
	}
	virtual double gradient( const VectorXf & x, VectorXf & dx ) {//NORMALIZE_SYMMETRIC
		p_.setKernelParameters( x );
		dx = p_.kernelGradient( v0_, v1_ );
		MatrixXf tmp = 0*v1_;
		p_.apply( tmp, v1_ );
		return (tmp.array()*v0_.array()).sum();
	}
};

int main() {