Moving Plot Around Curve Point

Could someone please explain how to make an animation of a moving plot point, that travels around a curve? I used the following commands:

t=6

syms t;

x(t)=sin(3*t^2)*(12*t+(10*13^(1/2))/13)

y(t)=cos(2*t^2)*(8*t+(30*17^(1/2))/17)

z(t)=t*(4*17^(1/2)*t+15)

figure(1);

fplot3(x(t), y(t), z(t), [0, 6]);

pts= linspace(0, 6, 100);

for k=1:length(pts)

fplot3(x(t), y(t), z(t), [0,6], '-k', 'LineWidth', 2);

hold on;

plot3(x(pts(k)), y(pts(k)), z(pts(k)),'r,', 'MarkerSize', 30);

hold off;

M(k)=getframe;

end

movie(M)

however no curve, nor point is formes, and no animation played.

[M S Zobaer]

hi, how to get " Symbolic Math Toolbox" for free? thanks

Answer 1

[Turlough Hughes]

Seems like just a syntax error. Modify the following line and see:

    plot3(x(pts(k)), y(pts(k)), z(pts(k)),'or', 'MarkerSize', 5,'MarkerFaceColor','red');

[Ragini Ravichandren]

Thank you! It works now, although the dot moves really slow.