how to save my 3d matrix in X,Y,Z coordinates
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I have 134* 2d matrix (86*86 each) and they make 86*86*134 matrix.
I need to generate a point cloud of this matrix and that is why I must save the Matrix in xyz coordinates.
how can I save the matrix (I) in xyz table
my matrix (I) was generated by the following code
clear all
close all
names=dir('inter the name of your file\*.tiff');
for iii=1:size(names,1)
I(:,:,iii)=imread(strcat('inter the name of your file\',names(iii).name));
for j=1:size(names,1)
Img_3D=surface('XData',[0 355;0 355],'YData',[0 0;355 355],'ZData',[29.85*j 29.85*j;29.85*j 29.85*j], 'CData' ,flipdim(im2double(I(:,:,iii)),1),'FaceColor','texturemap','EdgeColor','none');
colormap(gray)
xlabel('x')
ylabel('y')
zlabel('z µm')
end
end
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回答(1 个)
arushi
2024-8-12,5:51
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.
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