Turn a X Y Z matrix into a point cloud

I have a matrix as follows for example where the first column is X coordinate, second column is the Y coordinate and third column is the Z coordinate. How can i turn this matrix into a point cloud with pcwrite and pcshow? It has to be in a point cloud format.

[1 8 9; 2 3 4; 9 8 6]

[Adam Danz]

xyz = [1 8 9; 2 3 4; 9 8 6];
ptCloud = pointCloud(xyz)

ptCloud = 
  pointCloud with properties:

     Location: [3×3 double]
        Count: 3
      XLimits: [1 9]
      YLimits: [3 8]
      ZLimits: [4 9]
        Color: []
       Normal: []
    Intensity: []

pcshow(ptCloud,'MarkerSize',1000)

Answer 1

[Image Analyst]

Try

plot3(x, y, z);

or

scatter3(x, y, z);

or, if you have a surface rather than a cloud

surf(x, y, z);

[Sushmitha Kudari]

I have to have it in a point cloud format for when I export it.

[Image Analyst]

I never heard of it but I guess Hiroki has and it seems there is a function to put it into that class. Then you can export it somehow, like using save() to put it into a .mat file. What program are you exporting it for? What program will use this data that you exported? Does that program know how to read in .mat files? If not, what formats does that program know about?

Answer 2

[the cyclist]

xyzPoints = [1 8 9; 2 3 4; 9 8 6];
ptCloud = pointCloud(xyzPoints);

[Sushmitha Kudari]

This doesn't work for the following FILE

[Hiroki Okawa]

can you please show the error messages?

[Sushmitha Kudari]

There is no error message but the plot is a linear line which is incorrect. It is supposed to be topography map.

Answer 3

[Hiroki Okawa]

I think that pcshow function will woks

pcshow([1 8 9; 2 3 4; 9 8 6])

By the way, you can convert xyz matrix into point cloud format by pointCloud function

https://www.mathworks.com/help/vision/ref/pointcloud.html

ptCloud = pointCloud(xyzPoints)

in this case,

ptCloud = pointCloud([1 8 9; 2 3 4; 9 8 6])

[Sushmitha Kudari]

This doesn't work for the following FILE