www.gusucode.com > matlab从零到进阶程序与数据 > matlab从零到进阶程序与数据/第4章 MATLAB程序设计/ForLooPCompare4.m
function y = ForLooPCompare4(x) y(512,512) = 0; tic; for k2 = -1:1 for k1 = -1:1 for j = 2:511 for i = 2:511 y(i,j) = y(i,j)+x(i+k1,j+k2)/9; end end end end toc