Why won't \n give me a new line?
조회 수: 356 (최근 30일)
이전 댓글 표시
I am trying to write my data to a text file but the usual \n is not giving me a new line!
fid1 = fopen(filedesignation,'w');
fprintf(fid1,'%s, ',title1);
fprintf(fid1,'%4.2f, %4.2f, %4.2f, %4.2f, %4.2f\n',DataMatrix);
fclose(fid1);
When I try printing this to the command window, the \n works, but not when I try and write to a file. Why?!
How can I get a line return in my text file if this doesn't work?
댓글 수: 6
Jan
2019년 9월 4일
Fortunately even NotePad shipped with modern Windows 10 is able to display \n correctly now.
채택된 답변
Jan
2013년 8월 8일
It works perfectly when you write it to a file also. But the Windows NotePad ("Editor" in German) fails to display the linebreaks correctly. But Matlab's editor, Word, NotePad++, WordPad, (X)Emacs (under Linux and Windows), Alpha (on MacOS-9 !), BBEdit, vi, etc. display the \n line break correctly even without the \r.
When you open the file in the 'wt' mode, \n is converted to \r\n automatically, but this can have certain unexpected side effects. E.g. the number of characters obtained by ftell can differ from the number of bytes the file has. Reading by fgets will be slower, because all control characters are considered on the fly, e.g. backspaces and ^Z as end-of-file. In addition the created results differ between Windows and Linux. So I'd prefer to retire NotePad, install NotePad++ or WordPad as standard viewer of txt files and prefer the \n linebreaks as Matlab's editor does for several years now.
댓글 수: 1
Evangelos Stefanidis
2019년 5월 6일
Thank you Jan, I had totally forgot about Notepad++ ! Also Thank you Katie for asking this question, I had hard time for a while and I was only opening the .txt files with my results through matlab... lol.
추가 답변 (5개)
Cedric
2013년 8월 7일
You will need \r\n for producing a carriage return and a new line. This is a well documented issue between UNIX-based and Windows operating systems.
댓글 수: 3
Keqin Xu
2019년 1월 11일
Files created this way cannot be properly read using ...'deliminator','\n'...
An example is attached.
Walter Roberson
2019년 1월 11일
the success is going to depend on which command you are passing that parameter to and potentially on how you open the file.
Generally telling a function that the delimiter is \n is an interface contract: you are making a promise about the file and the function is permitted to take you at your word.
My guess looking at that file is that you would use
parts = regexp( fileread('Run_01.txt'), '\r?\n', 'split');
if isempty(parts{end})
parts(end) = [];
end
that will work whether the file has cr lf or lf only. It will not work for cr only though. This code will not remove interior empty lines. The if at the bottom is to handle the fact that if the file ends in newline then the split process thinks that there is an empty line after it. Files are permitted to either just end without a newline or else to end in a newline (that is to say that there is no standard as to whether newline is a line separator or else a line terminator .)
Camilo Rocha
2019년 4월 25일
You just have to put 'wt' when you call fopen function
fid1 = fopen(filename,'wt')
댓글 수: 0
Roxanne de la Garza
2018년 2월 3일
I put my \n at the beginning instead of the end and it worked for me. fprintf(fid1,'\n %4.2f, %4.2f, %4.2f, %4.2f, %4.2f',DataMatrix);
댓글 수: 2
ustin yanu
2020년 4월 6일
편집: ustin yanu
2020년 4월 6일
worked for me too, thx, wonder why?
i have this
elseif x<1300
a=x-1200;
b = [ fix(a/1e+2)-1E+2*fix(a/1e+4) rem(a, 1e+2)];
fprintf('\nYou entered %d:%d%d',b)
fprintf('\nThe equivalent time based on a 12-hour clock is %d:%d%d',b)
disp('PM')
Milad Hasani
2022년 8월 22일
As a suggestion, you can use:
\newline
댓글 수: 1
Walter Roberson
2022년 8월 23일
\newline is for Latex, and will not work for fprintf() or sprintf()
fprintf('abc\newlinedef')
참고 항목
카테고리
Help Center 및 File Exchange에서 Environment and Settings에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!