Asked by Tomer
on 30 Aug 2019

I have set of x, y and z coordinates of two objects and I want to create animation of the object's 3D trajectory/motion using these coordinates. Consider the first coordinate in the set as the initial position. Can anyone help me with this.

Answer by David K.
on 30 Aug 2019

Edited by David K.
on 3 Sep 2019

I would do it like this:

% x1,x2,y1,y2,z1,z2 are your coordinate vectors

tstep = .1; % the amount of time between each value in the vectors

figure(1)

for n = 1:length(x1)

plot3(x1(1:n),y1(1:n),z1(1:n),'+-',x2(1:n),y2(1:n),z2(1:n),'+-')

title((n-1)*tstep); % label the time of each step

pause(.01)

end

If the default view of the plot is bad mess around with the view function to try and get a better one.

This will make an animation with both, to make the other two animations simply repeat it and leave out the xyz coordinates of the one you do not want to look at.

edit: fixed so it should actually work now

darova
on 31 Aug 2019

Can you please show something? Did you try something?

Tomer
on 1 Sep 2019

See, the attachment

tstep = .1; % the amount of time between each value in the vectors

figure(1)

for n = 1:length(x)

plot3(x,y,z,'+-')

title((n-1)*tstep); % label the time of each step

pause(.01)

end

I could see only the plot but, not the animation video.

David K.
on 3 Sep 2019

Oh woops the plot3 should actually be this, i've also updated my original answer with it.

plot3(x(1:n),y(1:n),z(1:n),'+-')

Then, the axis will auto update as the values are added. If you do not want the line change '+-' to '+'

You also may need to add this to it to hold the axis positions.

xlim([lowX upX]);ylim([lowY upY]);zlim([lowZ upZ]);

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