How to build a .dat file with a cell variable

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Yode
Yode 2017-7-8
评论： 倪清策 倪 2021-6-1
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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回答（1 个）

Image Analyst
Image Analyst 2017-7-8
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
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Walter Roberson
Walter Roberson 2017-7-12
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
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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