Hi Mohannad,
I understand that you want to convert a 3d matrix into XYZ coordinates.
To save the matrix `I` in XYZ coordinates, you can use the `writematrix` function in MATLAB. Here is how you can save the matrix in an XYZ table format:
% Assuming I is your 3D matrix of size 86x86x134
% Reshape the matrix to a 2D matrix of size 7396x134
I_reshaped = reshape(I, [], size(I, 3));
% Generate XYZ coordinates
[X, Y, Z] = meshgrid(1:size(I, 1), 1:size(I, 2), 1:size(I, 3));
% Reshape the coordinates to a 2D matrix of size 7396x134
X_reshaped = reshape(X, [], size(I, 3));
Y_reshaped = reshape(Y, [], size(I, 3));
Z_reshaped = reshape(Z, [], size(I, 3));
% Combine the coordinates and intensity values
xyz_data = [X_reshaped(:), Y_reshaped(:), Z_reshaped(:), I_reshaped(:)];
% Save the data as an XYZ table
% Combine the coordinates and data into a matrix
xyz_data = [X_reshaped, Y_reshaped, Z_reshaped, data_reshaped];
% Save the data as a space-separated text file
dlmwrite('data.txt', xyz_data, 'delimiter', ' ');
In this code, the `I` matrix is reshaped into a 2D matrix, and XYZ coordinates are generated using `meshgrid`. Then, the XYZ coordinates and intensity values are combined into a single matrix `xyz_data`. Finally, the `writematrix` function is used to save the data as an XYZ table, where each row represents a point with its XYZ coordinates and intensity value.
You can adjust the file name and delimiter (`' '`) according to your requirements. Optionally, you can specify column headers in the XYZ table by providing the `VariableNames` argument in the `writematrix` function.
Please refer to the following MATLAB documentation to know more about the ‘meshgrid,’ ‘dlmwrite’ and ‘reshape’ functions:
Hope this helps.
