fprintf output line break

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Nikolay Rodionov
Nikolay Rodionov 2012-8-4
评论： LeChat 2021-8-17
Hi all,
I am writing a code where under a string is generated and stored in an array.
After the array is stored, I use fprintf to write the array into an data file, and then later on the string within the array is replaced within a new string and the cycle repeats.
The problem I am having is that I have been unable to make each fprintf cmd to print in a new line in the output file so I get something looking like this:
dataline dataline dataline dataline dataline dataline dataline
...instead of this:
dataline
dataline
dataline
dataline
dataline
I've been tinkering with formatting but I still can't get it right. Can any one help me?
Thanks!!!
  1 个评论
Joao Linhares
Joao Linhares 2016-11-10
On my side it worked by:
fprintf(fid, '%s', thestring);
fprintf(fid,'\n');
So basically if you split the code it works better.
Cheers

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采纳的回答

Walter Roberson
Walter Roberson 2012-8-4
fprintf(fid, '%s\n', TheString);
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显示 1更早的评论
Midhulesh Vellanki
Midhulesh Vellanki 2017-11-1
This works, but open your file in Notepad++ or other application, default windows application does not represent the correct format, sometime shows new line as a space.
Walter Roberson
Walter Roberson 2019-2-22
On Windows, when you fopen() your file then use 'wt' instead of just 'w' to force CR+NL to be output instead of just NL

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更多回答（4 个）

Image Analyst
Image Analyst 2012-8-4
Try
fprintf(fid, '%s\n\r', TheString);
If that doesn't work try it with the n and r reversed.
fprintf(fid, '%s\r\n', TheString);
One of them should work.
  1 个评论
LeChat
LeChat 2021-8-17
Thank you!
fprintf(fid, '%s\r\n', TheString);
worked for me (Matlab 2021a on Windows).

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Matthew Cooper
Matthew Cooper 2019-2-21
If you are writing to a file recursively, you may need to substitute 'a' for 'w' on fopen:
fopen(fid,'foo.txt','w');
fprintf(fid,formatspec,text);
fclose(fid);
fopen(fid,'foo.txt','a');
fprintf(fid,formatspec,newtext);
  2 个评论
Walter Roberson
Walter Roberson 2019-2-22
That would not affect the user's situation. This was a newline vs carriage-return+newline matter.
Matthew Cooper
Matthew Cooper 2019-2-22
Can you suggest a better thread for my contribution? When you invert my answer for a question and ask it, you arrive here. It would have helped me, I am sure it will help someone else. Your clarification is also helpful. Cheers.

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Samu TanakaBlitch
Samu TanakaBlitch 2016-4-22
I was having the same issue earlier today when i was writing the code and other solutions i found on the internet was not working so i just inserted a disp('"space"') to make it push to the next line.
(earlier it was like this)
(afterwards)
(example of working one)
fprintf( 'The peak resultant head acceleration experienced in the TC-14 crash test is %4.2f g.',peak)
disp(' ')
fprintf('The peak resultant head acceleration experienced in the HCR-16 crash test is %4.2f g.',peakhcr)
disp(' ')
fprintf('The peak resultant head acceleration experienced in the FF-15 crash test is %4.2f g.',peakff)
  1 个评论
Walter Roberson
Walter Roberson 2016-4-22
You should have just put in \n
fprintf( 'The peak resultant head acceleration experienced in the TC-14 crash test is %4.2f g.\n',peak)

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Christine Itchon
Christine Itchon 2020-6-19
What do you think would happen if the newline character were omitted from the fprintf statement below?
>> fprintf(‘The value is %d, for sure!\n’,4^3)
  1 个评论
Image Analyst
Image Analyst 2020-6-19
Go ahead and try it.
>> fprintf('The value is %d, for sure!\n',4^3)
The value is 64, for sure!
>> fprintf('The value is %d, for sure!',4^3)
The value is 64, for sure!>>
As you can see if the final newline is omitted, the >> prompt does not happen on the next line. It happens on the same line.

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