writing a matrix into a file

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Tina 2013-3-29

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评论： Aman Kumar 2020-11-3

Hello;

I have a matrix A, let's say it is a 100x1 matrix. I want to put the data into a text file, such that each line corresponds to the row of my matrix. How can I do it?

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Answer 1

Azzi Abdelmalek 2013-3-29

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编辑：Azzi Abdelmalek 2013-3-29

在 MATLAB Online 中打开

dlmwrite('file.txt',A)

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Azzi Abdelmalek 2013-3-29

编辑：Azzi Abdelmalek 2013-3-29

在 MATLAB Online 中打开

Use

dlmwrite('file.txt',A,'newline','pc')

Aman Kumar 2020-11-3

Just take transpose of your matrix and then write it to a file

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Answer 2

the cyclist 2013-3-29

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编辑：the cyclist 2013-3-29

在 MATLAB Online 中打开

There are many possible ways. One is to use the frprintf() function. See

doc fprintf

for syntax and examples.

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Tina 2013-3-29

I know, but I could not figure out how I can have the file such that each line has only one number in it.

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Answer 3

Susan 2013-3-29

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Here's a basic script that you should be able to modify and get to work using fprintf. Look at the help document for other things you can specify, like field width.

homedir = cd; % Save current directory as home directory
nrows = size(A,1);
flnm = 'Matrix A'; % Specify string for filename   
cd(newdir); % Change directory to new directory, if desired. Must specify string for new directory.
fid = fopen(flnm,'wt+'); % Create writable textfile
% Enter data into text file
for i = 1:nrows
    fprintf(fid,'%f\r\n',A(i,:)); % The %f is for floating point numbers, or    you could use %d for double-precision integers
end
% Close text file and return to home directory
fclose(fid);
cd(homedir); % Return to home directory