添加背景图片画图matlab

clear

clc

close all

cd('C:\Users\wind\Desktop')

ha=axes('units','normalized','position',[0 0 1 1]);

uistack(ha,'down')

II=imread('PP.png');

image(II)

colormap gray

set(ha,'handlevisibility','off','visible','off');

x=-pi:0.1:pi;

y=x.*sin(x.*cos(x)).*tan(x);

plot(x,y,'LineWidth',2)

set(gca,'color','none') %这里以前自己没有注意