suptitle 绘制总标题

原文地址：https://blog.csdn.net/hlboy_happy/article/details/77581802

data = randn(4,100);

figure(1);

subplot(221);plot(data(1,:));

subplot(222);plot(data(2,:));

subplot(223);plot(data(3,:));

subplot(224);plot(data(4,:));

suptitle('总图标题');