q258.m

电路与系统专业的matlab程序。有很多经典的实例。

%This is a example for 2.2.2
[x,y] = meshgrid(-3:1:3);
z = peaks(x,y);
surf(x,y,z);
[xi,yi] = meshgrid(-3:0.25:3);
zi1 = interp2(x,y,z,xi,yi,'nearest');
zi2 = interp2(x,y,z,xi,yi,'bilinear');
zi3 = interp2(x,y,z,xi,yi,'bicubic');

figure;
subplot(1,2,1);
surf(xi,yi,zi1) % nearest
subplot(1,2,2);
contour(xi,yi,zi1);

figure;
subplot(1,2,1);
surf(xi,yi,zi2) % bilinear 
subplot(1,2,2);
contour(xi,yi,zi2);

figure;
subplot(1,2,1);
surf(xi,yi,zi3) % bicubic
subplot(1,2,2);
contour(xi,yi,zi3);