Filter löschen
Filter löschen

How to format surface data into XYZ point cloud?

30 Ansichten (letzte 30 Tage)
flemingtb
flemingtb am 4 Jan. 2019
Kommentiert: Walter Roberson am 12 Mai 2020
I have a .csv data set that is 10x22 surface data and i'd like to convert it to XYZ point cloud. What is the best way to do this in Matlab?
  3 Kommentare
Walter Roberson
Walter Roberson am 4 Jan. 2019
Bearbeitet: Walter Roberson am 5 Jan. 2019
to confirm you want a 3d pointcloud with 220 points ?
do you have the marginal coordinates , 10 y and 22 x?
Cris LaPierre
Cris LaPierre am 4 Jan. 2019
What determines Z in your surface?

Melden Sie sich an, um zu kommentieren.

Akzeptierte Antwort

Walter Roberson
Walter Roberson am 5 Jan. 2019
vector_of_x = as appropriate
vector_of_y = as appropriate
[X, Y] = meshgrid(vector_of_x, vector_of_y);
points = [X(:), Y(:), z(:)];
ptCloud = pointcloud(points);
  3 Kommentare
Onur Kurum
Onur Kurum am 12 Mai 2020
Hi,
I need to do the exact same thing but I don't have the Image Processing Toolbox. Is there a 'vanilla' way of doing this?
Walter Roberson
Walter Roberson am 12 Mai 2020
pointCloud is part of the Computer Vision Toolbox
pointCloud() is a particular data type in MATLAB. If you do not have Computer Vision, then you cannot create the datatype, so it is not clear what you want to do? If you just want an array of three columns, X, Y, Z, and you are starting from a 2D array, then use the code I posted but stop after the assignment to points

Melden Sie sich an, um zu kommentieren.

Weitere Antworten (2)

Cris LaPierre
Cris LaPierre am 4 Jan. 2019
If you can successfully create a surface with your data using surf(X,Y,Z), the best way to create an X,Y,Z point cloud is to use scatter3(X,Y,Z).
  4 Kommentare
Don jaya
Don jaya am 9 Apr. 2020
I create a surface from the data i have. How to get the Z value of the surface with using only random x and y cordinates
Walter Roberson
Walter Roberson am 12 Mai 2020
Don jaya, could you describe what your available inputs are, and what outputs you want?

Melden Sie sich an, um zu kommentieren.


flemingtb
flemingtb am 7 Jan. 2019
I've attached the data file. I need to convert this format to XYZ columns.
All that i have done so far is to get size data to know how many rows and columns the data sets have, i don't know how to format the data based on it's location in the point map though.
  3 Kommentare
flemingtb
flemingtb am 7 Jan. 2019
Yes that is correct, column number is (X), Row number is (Y) and (Z) data. Maybe i didn't call it the correct thing.
Cris LaPierre
Cris LaPierre am 7 Jan. 2019
See walter's answer.

Melden Sie sich an, um zu kommentieren.

Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by