How to build a .dat file with a cell variable
1 view (last 30 days)
Show older comments
There is a picture in my textbook
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/165879/image.png)
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?
1 Comment
Answers (1)
Image Analyst
on 8 Jul 2017
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
7 Comments
Walter Roberson
on 12 Jul 2017
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
on 12 Jul 2017
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.
See Also
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!