Correct Magic Square to text file?
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In the simple script below, why when I open myfile.txt is its composed of A and not B (the transpose of A), even though I asked for the latter in the last line
A = magic(4);
B=A';
fileID = fopen('myfile.txt','w');
nbytes = fprintf(fileID,'%5d %5d %5d %5d\n',B);
1 个评论
Stephen23
2022-1-21
A much simpler way to save the matrix is to use WRITEMATRIX or DLMWRITE or similar.
回答（2 个）
Rik
2022-1-21
0 个投票
Your file is written row by row, while Matlab will read the data in B column by column.
So while most people would not expect this behavior, it is actually the expected behaviour.
You will have to transpose the the array again (or use the original).
Image Analyst
2022-1-21
Try this:
% Create matrix.
A = magic(5)
% Write it out to a text file.
filename = fullfile(pwd, 'A Magic 5.txt')
writematrix(A, filename, 'Delimiter', ' ');
% Verify by typing it to the command window.
type(filename)
%delete(filename)
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