MATLAB: How to print each matrix row on a separate line when using DLMWRITE in MATLAB 7.10 (R2010a)

eolMATLAB

I am trying to print a matrix to a text file using the DLMWRITE function as in the example below:

M = [1 ;2 ;3 ;4 ; 5]
dlmwrite('myfile.txt', M, 'delimiter', '\t');

The file is created correctly, but when I open it using Notepad, I see all the matrix elements printed on a single line rather than each element being printed on a separate line. How can I ensure that each row in the matrix is printed on a separate line?

Best Answer

'Notepad' does not recognise the end of line character used in DLMWRITE. If the file is opened using a different editor such as 'WordPad', the matrix will be displayed correctly with each row being displayed on a separate line.

If your code is to be run on a Windows machine, you can use the following syntax to ensure that the correct end of line character is used. This will guarantee that the file is displayed correctly regardless of the text editor used to open it:

dlmwrite('myfile.txt', M, 'delimiter', '\t','newline', 'pc');

Related Solutions

MATLAB: Write matrices in notepad

I think you can do this:

Either create a column vector in MATLAB and then just use save -ascii

For example:

x = randn(1,500);
 x = x';
 save('test.txt','x','-ascii')

Use '\n' as the delimiter

x = randn(1,500);
  dlmwrite('test.txt',x,'delimiter','\n','newline','pc');

MATLAB: Am I having trouble reading an ascii file in notepad that I produced using FPRINTF

Using the following syntax will open the file in text mode, allowing it to be read in notepad:

fid=fopen('out.txt','wt');
fprintf(fid,'%i\n',3);
fclose(fid)

This is because of the "t" flag in the FOPEN statement. Without the "t" flag, the ascii file produced will only print one newline character, while PC standard ASCII files expect two different characters, '/r/n'.

This can be demonstrated by the fact that the following syntax also works:

fid=fopen('out.txt','w');
fprintf(fid,'%i\r\n',3);
fclose(fid)

For more information on the FOPEN function, see:

http://www.mathworks.com/access/helpdesk/help/techdoc/ref/fopen.shtml

Best Answer

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MATLAB: Write matrices in notepad

MATLAB: Am I having trouble reading an ascii file in notepad that I produced using FPRINTF

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