Importing Point cloud to overlay on solid object

I would like to import point cloud data from metrology system into Matlab.

The datatype i have point cloud is in text/asc/spreesheet/can also be converted to matlab array

i would like to visualise these points and later place these on the solid step file object i imported earlier to see the diffrence between them.

i tried to use mesh function but i get these errors , so i tried to change the import type and it doesn't work .

Error in Test2 (line 3)
x = Experiment1coordinates.X; % All x values
    ^^^^^^^^^^^^^^^^^^^^^^^^
    
    >> Test2
Error using mesh (line 71)
Z must be a matrix, not a scalar or vector.

Error in Test2 (line 6)
s = mesh(x,y,z,'FaceAlpha','0.5')
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    
    
    

[Mathieu NOE]

if you have data in vectors (scattered data) , you must use scatter3 or trisurf

otherwise you must first create a 3d gridded array using meshgrid or ndgrid

[William Rose]

@Dhinu, provide an example of your data file or files, if you want more assistance.

Answer 1

[Walter Roberson]

You probably need to use scatteredInterpolant . In some cases the scattered data is an "unraveled" rectangular grid; in such cases you can reshape() the data to be a grid and then use griddedInterpolant

You might also consider https://www.mathworks.com/matlabcentral/fileexchange/63730-surface-reconstruction-from-scattered-points-cloud or https://www.mathworks.com/matlabcentral/fileexchange/51117-delaunay_surf or https://www.mathworks.com/matlabcentral/fileexchange/72090-tricont

[Dhinu]

i have the point cloud in the matlab now. I imported it as Csv file and used mesh function and later used pcshow to visualise the point cloud . but the point cloud is completely opposite to the actual surface since the point cloud was measured resting it on the surface horizontally, but the object is inverted 180 , how can i fit this when(i used pdeplot for importing the solid object)