writing a matrix into a file

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?

Answer 1

[Azzi Abdelmalek]

dlmwrite('file.txt',A)

[Tina]

This just puts the numbers of the matrix right next to eachother. I want the file such that each line has only one number in it. How can I do it?

[Azzi Abdelmalek]

That depends on how you open your txt file, with wordpad you will get one column, with notepad you will get one line

[Azzi Abdelmalek]

Use

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

[Aman Kumar]

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

Answer 2

[the cyclist]

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

doc fprintf

for syntax and examples.

[Tina]

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

Answer 3

[Susan]

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

[James Tursa]

@Eric: Please delete this comment and instead open up a new question with your code.

Answer 4

[Eric Berger]

I'm going to try to debug on my own, I can delete this if you want