create a trajectory for 3D points of different frames

https://www.dropbox.com/s/14oxr168h4p33t4/trajcetorirs.png

I have a frames of depth images representing 3d points, I want to plot the trajectories of each 3d point in Matlab, but I'm not sure how can I create the trajectory of each point and through frames then plot it, so if anyone could please advise. I've searched but I only find how to plot a trajectory, but I don't know how to create trajectories for every point in different frames.

[Walter Roberson]

If you have three space dimensions and then time as well, you would be attempting to produce a 4D plot. In order to represent the 4th dimension you would need to encode it as color or marker shape or marker size or transparency

[Hussein]

I've uploaded a pic showing what I want to do. Thanks Walter for your reply. I don't know how can I create the trajectory for each 3d point of several frames. Lets say that the depth video captures my hand waving.So I'll assume that the whole thumb will be represented in a pixel Pi1 in frame1 the thumb finger in in position Pos1. What I want to know is how I'm gonna say that the thumb moved to pos2 in frame2?So,what I mean is I want to know the location of the moving object in the frame with the next frames. So, in the waving hand example,if there are 100 3d points or pixels representing the hand in frame1,I want to know the corresponding pixels of these points in the next frames cause the hand is moving,and this is the trajectories I want to create