connecting sinus function with circle through animation

Question

nirwana 2023-3-20

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1931670-connecting-sinus-function-with-circle-through-animation

回答： Cameron 2023-3-21

Hi...I am trying to make animation that shows sinus function is a circle as ilustrate in the fig. First my problem is how to rotate the sinus fig (i use camroll (90) but it bit weird). second how to connect the line that walk over sinus and circle?

syms t;
t=0:0.01:2*pi;
x=3*cos(t);
y=3*sin(t);
subplot(2,1,1)
plot(t,y)
subplot(2,1,2)
plot (x,y,'-b');
axis square
camroll(90)

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Answer 1

Cameron 2023-3-21

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1931670-connecting-sinus-function-with-circle-through-animation#answer_1197325

在 MATLAB Online 中打开

t=0:0.01:2*pi;
x=3*cos(t);
y=3*sin(t);
tiledlayout(2,1)
nexttile
p1 = plot(t,y);
axis square
camroll(90)
title('t vs. y')
nexttile(2)
p2 = plot(x,y,'--b');
axis square
camroll(90)
title('x vs. y')
h1 = animatedline(p1.Parent,...
    'LineStyle','none',...
    'Marker','o',...
    'MarkerFaceColor','b',...
    'MarkerEdgeColor','k');
h2 = animatedline(p2.Parent,...
    'LineStyle','none',...
    'Marker','o',...
    'MarkerFaceColor','b',...
    'MarkerEdgeColor','k');
h3 = animatedline(p2.Parent,...
    'LineStyle','-',...
    'Color','b',...
    'Marker','none');
increment = 8;
while true %loop until you close the figure
    for k = 1:increment:length(t)
        addpoints(h1,t(k),y(k))
        addpoints(h2,x(k),y(k))
        addpoints(h3,[0,x(k)],[0,y(k)])
        drawnow
        clearpoints(h1)
        clearpoints(h2)
        clearpoints(h3)
    end
    
    for k2 = length(t):-increment:1
        addpoints(h1,t(k2),y(k2))
        addpoints(h2,x(k2),y(k2))
        addpoints(h3,[0,x(k2)],[0,y(k2)])
        drawnow
        clearpoints(h1)
        clearpoints(h2)
        clearpoints(h3)
    end
end