matlab 图像中用text文字标注

图像中用text文字标注

clc,clear;
close all;
x=0:pi/50:2*pi;
plot(x,sin(x));
title('正弦函数图形')
xlabel('x Value');
ylabel('sin(x)');
text(3*pi/4,sin(3*pi/4),'<---sin(3pi/4)');
text(5*pi/4,sin(5*pi/4),'sin(5pi/4)\rightarrow','HorizontalAlignment','right');