Correct Magic Square to text file?

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Neil Ogle
Neil Ogle 2022-1-21
评论： Neil Ogle 2022-1-24
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
Stephen23 2022-1-21
A much simpler way to save the matrix is to use WRITEMATRIX or DLMWRITE or similar.

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回答（2 个）

Rik
Rik 2022-1-21
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
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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