plot the recent data with drawnow in level-2 matlab file s-function

6 次查看（过去 30 天）
Benutzer Name
Benutzer Name 2018-8-17
评论： majety 2018-8-17
Hello,
I plot a flat surface and rotate it with "drawnow" in a figure. I used to do this in a "level-2 matlab file s-function" for my Simulink simulation. It works in principal , but the figure updates the recent plot every t_out. It is like I would use the "hold on" command in a normal script. After some time its just a cylinder because Matlab saves every plot. How can I get only the recent plot in the figure, like a flat surf who rotates ?

请先登录，再回答此问题。

采纳的回答

majety
majety 2018-8-17
You can number the figure as figure(1) and keep plotting your circle to the same figure. Make sure you get the length of your axes right so that the animation looks good. Also remember that you can use "hold off" if you don't want a cylinder from your piled up circles.
Example:
for theta = 0:pi/50:2*pi;
x = 20 *cos(theta);
y = 20*sin(theta);
originx = 0;
originy = 0;
pause(0.01);figure(1);
plot([x,originx],[y,originy],'b','LineWidth',2);hold on;
plot(x,y,'k+','LineWidth',2);hold off;
xlim([-30,30]);ylim([-30,30]);
end
  2 个评论
Benutzer Name
Benutzer Name 2018-8-17
I tried it with my code but it doesn't work. You see the what's wrong?!
for x=0:pi/160:pi
pts = [4 -4 -4 4 ;
4 4 -4 -4 ;
0 0 0 0 ;
1 1 1 1 ];
axis equal
xlim([-10 10])
ylim([-10 10])
zlim([-10 10])
pause(0.01)
figure(1)
h1 = patch('FaceColor',[0.3010 0.7450 0.9330]);hold on;
h1.XData = pts(1,:) ./ pts(4,:);
h1.YData = pts(2,:) ./ pts(4,:);
h1.ZData = pts(3,:) ./ pts(4,:);
set(gca,'view',[30 30])
mrot = makehgtform('xrotate',x,'yrotate',0,'zrotate',0)
p2 = mrot*pts;
h2 = patch('FaceColor',[0.9290 0.6940 0.1250]);hold off;
h2.XData = p2(1,:) ./ p2(4,:);
h2.YData = p2(2,:) ./ p2(4,:);
h2.ZData = p2(3,:) ./ p2(4,:);
end
majety
majety 2018-8-17
try to add 'clf', so that it clears your figure before you plot over it again.
pause(0.01);figure(1);clf;

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Surface and Mesh Plots 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by