# How can I convert my 3 columns data to a .raw image file so that I can read it as an image?

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blues on 24 Aug 2021
Commented: KSSV on 24 Aug 2021
Dear users,
I am working on some simulations and output of the simulations are in 3D matrix but the data values are stored in .csv file, with voxel ID's. The voxel ID (iX, iY, and iZ): 0,0,0 is located at the corner of the 3D image as in nucler medicine images. Data is 10x10x10 matrix. Therefore, the center voxel of the 3D matrix is 5,5,5. See the data format in a sceenshot below:
....................................... up to 10, 10, 10 voxels.
I want to calculate the relationship of dose vs distance. So, I need to calculate the radial averaging of the dose as a function of radial distance as I put my sources at the center of the matrix. Could anyone of you help me by providing some clue on this? Any help would be greatly appreciated. I am thinking about converting it to the 3D image array so that I could easily manipulate it and plot the desired relationship.

KSSV on 24 Aug 2021
Let A be your matrix of three columns.
x = A(:,1) ; y = A(:,2) ; z = A(:,3) ;
%%structured
xi = unique(x) ; yi = unique(y) ;
[X,Y] = meshgrid(xi,yi) ;
Z = reshape(z,size(X)) ;
figure
pcolor(X,Y,Z)
figure
imagesc(Z)
blues on 24 Aug 2021
Edited: blues on 24 Aug 2021
Thanks for this: table2array function.
Now, I have a meshgrid of desired matrix size. How could I assign the 4th column (i.e. data) into the respective voxels? Following line works for this, right?
Dose_matrix =reshape(Dose, size(X));
KSSV on 24 Aug 2021
Yes it should work....

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