How to build a .dat file with a cell variable

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Yode 2017-7-8

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/347826-how-to-build-a-dat-file-with-a-cell-variable

评论：倪清策倪 2021-6-1

在 MATLAB Online 中打开

There is a picture in my textbook

Since this,I try to create a same .dat file for experiement.

>> m={'x2.3y4.56','x7.7y11.11','x12.5y5.5'};
>> save('file.dat','m')
>> type file.dat
MATLAB 5.0 MAT-file, Platform: PCWIN64, Created on: Sat Jul 08 11:19:36 2017

As you see,the type will give a wrong result.So I try

save('file.dat','m','-ascii')
Well,this time I will get some wrong information.How to create that *.dat* file?

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倪清策倪 2021-6-1

[R,P]=corrcoef(test);

R=[2.41;2.05;2.34;1.48;1.39];

P=[0.34;0,5;0.42;0.43;0.42];

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Image Analyst 2017-7-8

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https://ww2.mathworks.cn/matlabcentral/answers/347826-how-to-build-a-dat-file-with-a-cell-variable#answer_273321

在 MATLAB Online 中打开

Use fprintf():

m = {'x2.3y4.56', 'x7.7y11.11', 'x12.5y5.5'};
fid = fopen('file.dat', 'wt');
for k = 1 : length(m)
  fprintf('%s\n', m{k});
end
fclose(fid);
type file.dat

The difference between 'w' and 'wt' is that on MS Windows systems, if you use 'wt' then any time that you send a newline (char(10), format code '\n') to the file, the I/O subsystem will automatically write carriage return (char(13), format code '\r') before the newline. This provides backwards compatibility with NotePad and other old programs that expect CR/NL pairs at the end of lines.

On Linux and OS-X, 'w' and 'wt' do the same thing, which is to say that they send only newline without carriage return.

Jan 2017-7-12

In addition to the line break conversion, the output in text mode considers char(8) or sprintf('\b') as backsapce and removes the former character. The EOF-Escape sequence can stop the reading of the file also, even if more characters are following. In consequence the number of written characters must not equal the number of characters to write.

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