matlab中图像可视化的示例分析

clear all;clc;close allx = -1*pi:0.01:1*pi;y1 = sin(x);y2 = cos(2*x);figuresubplot(121)plot(x,y1,x,y2)title('默认')
subplot(122)h= plot(x,y1,'r--','linewidth',2);hold onplot(x,y2,'b-','linewidth',2)xlabel('这是x轴标签')ylabel('这是y轴标签')xlim([-pi pi])ylim([-1.1 1.1])grid on set(gca,'linewidth',0.8,...    'fontsize',14,...    'xtick',-pi:pi/2:pi,...    'xticklabel',{'-\pi','-{\pi}/{2}','0','\pi/2','\pi'})text(-1.5,0,'这是文本','BackgroundColor','r')h=fill([-pi pi pi -pi],[-1.1 -1.1 -0.4 -0.4],'g')h.FaceAlpha=0.3text(-0,-0.9,'涂层填充','BackgroundColor','r')annotation('textarrow',[0.4 0.46],...    [0.78 0.715],'Color',[0 0 1],...    'TextBackgroundColor',[1 1 0],...    'String',{'文本箭头：cos(2x)'},...    'LineWidth',2);title('处理后')h=legend('sin(x)','cos(2x)');title(h,'这是图例')