How to save 3D data in text file?

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Jamie Al
Jamie Al 2022-6-1
回答： KSSV 2022-6-1
I am trying to print my 3D data in a text file so I can perform some postprocessing. The form of my 3D data is the following:
%size Nx x Ny x Nz double
val(:,:,1) =
1.0e-03 *
-0.1330 -0.0709 0.1597 0.1604 -0.0717 -0.1323 -0.0717 0.1604 0.1597 -0.0709
-0.1298 -0.0725 0.1376 0.1380 -0.0730 -0.1294 -0.0730 0.1380 0.1376 -0.0725
-0.1158 -0.0565 0.1374 0.1377 -0.0567 -0.1155 -0.0567 0.1377 0.1374 -0.0565
-0.0752 -0.0363 0.0748 0.0748 -0.0363 -0.0752 -0.0363 0.0748 0.0748 -0.0363
-0.0355 -0.0119 0.0498 0.0498 -0.0120 -0.0355 -0.0120 0.0498 0.0498 -0.0119
-0.0077 -0.0028 0.0033 0.0033 -0.0028 -0.0077 -0.0028 0.0033 0.0033 -0.0028
-0.0041 0.0029 0.0171 0.0171 0.0029 -0.0041 0.0029 0.0171 0.0171 0.0029
-0.0112 -0.0058 0.0076 0.0076 -0.0058 -0.0112 -0.0058 0.0076 0.0076 -0.0058
-0.0237 -0.0086 0.0398 0.0399 -0.0087 -0.0236 -0.0087 0.0399 0.0398 -0.0086
-0.0272 -0.0167 0.0272 0.0273 -0.0168 -0.0271 -0.0168 0.0273 0.0272 -0.0167
-0.0291 -0.0132 0.0472 0.0474 -0.0134 -0.0288 -0.0134 0.0474 0.0472 -0.0132
val(:,:,2) =
...
How can I write this to text file?

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采纳的回答

KSSV
KSSV 2022-6-1
m = 4; n = 3 ; p = 4 ; % dimensions for matrix
A = rand(m,n,p); % make a dummy 3d matrix
F = [repmat(' %0.4f',1,n),'\n']; % make the required format
fid = fopen('test.txt','w') ; % open file to write
% loop to write each 2D matrix
for i = 1:p
fprintf(fid,F,A(:,:,i).') ; % write the p'th matrix
fprintf(fid,'\n') ; % give empty space after a matrix is written
end

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