p(x)can also be treated as the density near x. x(1 Volume =∑) K(x-x1)=1 K(x-x2)=1 Using the symmetry of the function K(x-x3)=1 k(u),we can now reinterpret this equation,not as a single cube centered on x but as the K(x-x4)=0 sum over N cubes centered on the N data points xn. 13/27▶ p ( x ) can also be treated as the density near x n . p ( x) = 1N ∑Nn=1 1hD k ( x − x n h ) Using the symmetry of the function k(u), we can now reinterpret this equation, not as a single cube centered on x but as the sum over N cubes centered on the N data points x n . 13 / 27