matlab - 沿圆MATLAB创建2个移动点

Question

我想在 MATLAB 中沿一个圆有 2 个移动点。我有以下脚本：

xCenter = 5;
yCenter = 5;
theta = 0 : 0.01 : 2*pi;
radius = 8;
x = radius * cos(theta) + xCenter;
y = radius * sin(theta) + yCenter;

figure
plot(x,y);
hold on; % hold on so that the figure is not cleared
hLine = line('XData',x(1), 'YData',y(1), 'Color','r', ...  
    'Marker','o', 'MarkerSize',6, 'LineWidth',2);  
hLine2 = line('XData',x(1), 'YData',y(1), 'Color','g', ...  
    'Marker','o', 'MarkerSize',6, 'LineWidth',2); 


for i=1:length(x)
 set(hLine,'xdata',x(i),'ydata',y(i)); % move the point using set
                                  % to change the cooridinates.
 M(i)=getframe(gcf);

end


for j=1:length(x)

 set(hLine2,'xdata',x(j),'ydata',y(j)); % move the point using set
                                  % to change the cooridinates.
 N(j)=getframe(gcf);

end



%% Play the movie back


% create figure and axes for playback
figure
hh=axes;
set(hh,'units','normalized','pos',[0 0 1 1]); 
axis off

movie(M)
movie(N)% play the movie created in the first part

该脚本有效，但它只移动一个点而不是这些点。有人能帮我说说为什么只有一点移动吗？

亲切的问候

Answer 1

第一个猜测是你可能想要这个：

for ii=1:length(x)
   set(hLine,'xdata',x(ii),'ydata',y(ii)); 
   set(hLine2,'xdata',x(length(x) - ii + 1),'ydata',y(length(x) - ii + 1));                              
   M(i)=getframe(gcf);
end
.
.
.
movie(M)