write multiple line of text into a text file

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Ali
Ali 2017-8-3
评论： Walter Roberson 2017-8-5
Simple question; I have this variable which I want easily write to a text file (it can be a hundred of lines, I just cut it into 4 to fit here)
app.DCMtxt.Value
ans =
4×1 cell array
'3 Message(s) transmitted '
''
' ws BUS ID Rx Node DLC Cycle Extended'
' ______ ___ ____ __ ____ ___ _____ ________'
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Ali
Ali 2017-8-4
编辑：Ali 2017-8-4
Thanks for the replies. Per, it does not write to the file. I also get: Warning: Escaped character '\s' is not valid. See 'doc sprintf' for supported special characters. I see it reads it line by line, nice!
Ali
Ali 2017-8-4
looks like Per's answer had a typo and otherwise working well, so I'm reposting it with minor change as an answer
fid = fopen('output.txt','w');
for jj = 1 : size( app.DCMtxt.Value, 1 )
fprintf( fid, '%s\n', app.DCMtxt.Value{jj,1} );
end
fclose(fid);

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采纳的回答

Walter Roberson
Walter Roberson 2017-8-4
fid = fopen('output.txt','w');
fprintf(fid, '%s\n',app.DCMtxt.Value{:}) ;
fclose(fid) ;
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Rik
Rik 2017-8-5
You might need to replace the control characters:
escaped_cellstr=app.DCMtxt.Value;
escaped_cellstr=strrep(escaped_cellstr,'%','%%');
escaped_cellstr=strrep(escaped_cellstr,'/','//');
fid = fopen('output.txt','w');
fprintf(fid, '%s\n',escaped_cellstr) ;
fclose(fid) ;
Walter Roberson
Walter Roberson 2017-8-5
No, Rik, that is not needed. That would only be needed if you were using the string content inside the format. For example, the following would be a problem:
fid = fopen('output.txt','w');
for jj = 1 : size( app.DCMtxt.Value, 1 )
fprintf( fid, app.DCMtxt.Value{jj,1} );
fprintf( fid, '\n' );
end
fclose(fid);

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Will Wilson
Will Wilson 2017-8-4
If you didn't want to use a for loop directly you could use a newer datatype called a table and one if it's helper functions to get the job done. Here is an example:
% Convert your [m x 1] cell array into a MATLAB table.
data = cell2table(app.DCMtxt.Value);
% (Optionally) name the column in your table.
data.Properties.VariableNames = {'DataSet'};
% Write the table out to a text file.
writetable(data,'OutputData');
This should do the trick. Ultimately it will depend on how much control you need on the text file you write out.

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