Matlab GUI. How can i make an animated dot in a parabola in a 1 by 1 plane?

5 次查看（过去 30 天）
Ariel Goya
Ariel Goya 2019-4-4
评论： Andreas Bernatzky 2019-4-4
Hi everyone, I need help to do an animated dot. but instead of a straight line, i need to do it in a parabola in a 1 by 1 plane. How can I code this?
  3 个评论
显示 1更早的评论
Image Analyst
Image Analyst 2019-4-4
Not sure what a 1 by 1 plane, but did you try plotting with just . instead of -?
Instead of
plot(x, y, 'b-');
try
plot(x, y, 'b.', 'MarkerSize', 18);
Ariel Goya
Ariel Goya 2019-4-4
i am sorry, i meant in a x and y axes plane. so far i made the dot to move in a straight line, but i need it to move in a parabola.
a = [0, 0];
b = [ 1 , 1];
% straight line function from a to b
func = @(x)b(1) + (b(1)-a(1))/(b(1)-a(1))*(x-b(1));
% determine the x values
x = linspace(a(1),b(1),800);
% determine the y values
y = func(x);
% create the figure
figure;
% get a handle to a plot graphics object
hPlot = plot(0,0,'r*');
% set the axes limits
xlim([min(a(1),b(1)) max(a(1),b(1))]);
ylim([min(a(1),b(1)) max(a(1),b(1))]);
% iterate through each point on line
for k=1:length(x)
% update the plot graphics object with the next position
set(hPlot,'XData',x(k),'YData',y(k));
% pause for 0.5 seconds
pause(0.005);
end

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Andreas Bernatzky
Hey Ariel,
with a 1by1 plane you mean a simple xy plane?
Here a rough example. You should consider the command draw now.
x=-10:0.1:10;
y=x.^2+x+1;
for(xmom=x(1):0.1:10)
plot(x,y);
hold on
ymom=xmom.^2+xmom+1;
plot(xmom,ymom,'-o');
pause(0.1);
clf;
end
  2 个评论
Ariel Goya
Ariel Goya 2019-4-4
Thank you Andreas, it worked i just need to plot an image instead of a dot, and also i need the line to be transparent.
Andreas Bernatzky
Andreas Bernatzky 2019-4-4
Transparency should be easy: https://de.mathworks.com/help/matlab/ref/alpha.html
Ploting an image with variable position I am not really familiar with this. I just used
https://de.mathworks.com/help/images/ref/imshow.html once and it worked for me. But my application had not a moving image. But I think you should be able to manipulate the image position by the Position handle of an object in a figure. Thats what I would try first.

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 Lighting, Transparency, and Shading 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