mch04-42.txt

matlab 图象处理

交互式图形的绘制

axis([0 10 0 10])
hold on
% 初始化，此时点列表为空
x = [];
y = [];
n = 0;
% 循环，用鼠标点击，确定点列表中的点
disp('单击鼠标左健点取需要的点')
disp('单击鼠标右键确定最后一个点')
but = 1;
while but == 1
[xi,yi,but] = ginput(1);
plot(xi,yi,'go')
n = n+1;
disp('单击鼠标键确定下一个点')
x(n,1) = xi;
y(n,1) = yi;
end
t = 1:n;
ts = 1: 0.1: n;
xs = spline(t,x,ts);
ys = spline(t,y,ts);
plot(xs,ys,'c-');
hold off