% mm2408.m[x,y,z] = peaks; % default output of peaksdx = x(1,2) - x(1,1); % spacing in x directiondy = y(2,1) - y(1,1); % spacing in y directionL = del2(z,dx,dy);surf(x,y,z,abs(L))shading interptitle('Figure 24.8: Discrete Laplacian Color')