How to convert 3d scattered points to coloured map?

I have three column vectors xp, yp, zp, where each column set of these vectors form the coordinate for a point in 3d space. I used plot3 function to plot the scattered points. however, the result showed that my points has a pattern as shown in the attached figure. I am seeking for a method to let the scattered points have colour rather than one colour plot. it is not possible to look after each point and colour it according to its z-value, even with for loop, because I have large number of points

Answer 1

[Walter Roberson]

scatter3(x, y, z, pointsize, color)

The color can be the z if appropriate.

If each of the "sheets should be a different color then that could be more difficult. Perhaps using a k nearest neighbor search and some kind of region growing?

Perhaps knnsearch of random point, fit a plane, find all points within a distance of that plane, consider them to be part of the same plane, associate a label, remove those from the active set, repeat with remaining points?

[Ayham Aljawabrah]

It seems good solution, but the distance for each individual point should be computed, but I have around 2.5 million point in the vector

[Walter Roberson]

knnsearch() for points of dimension up to 10 does not require computing the distance of every point to every other point. For dimension 3 like you are using, knnsearch would effectively form an octree first, and that is fast to search.

[Ayham Aljawabrah]

Thank you!

This is helpful.