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How to convert .mat file into text file in a specific format ?

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SUSHMA MB
SUSHMA MB on 27 Jul 2017
Edited: per isakson on 28 Jul 2017
How can i convert the .mat file into the following format of .txt file
x={
( 0.000000 0.000000 )
( 0.500000 0.333333 )
( 0.250000 0.666667 )
( 0.750000 0.111111 )
( 0.125000 0.444444 )
( 0.625000 0.777778 )
( 0.375000 0.222222 )
( 0.875000 0.555556 )
( 0.062500 0.888889 )
( 0.562500 0.037037 )
}

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Answers (1)

per isakson
per isakson on 27 Jul 2017
Edited: per isakson on 28 Jul 2017
I assume that the mat file contains a cell array named, x
x={
0.000000, 0.000000
0.500000, 0.333333
0.250000, 0.666667
0.750000, 0.111111
0.125000, 0.444444
0.625000, 0.777778
0.375000, 0.222222
0.875000, 0.555556
0.062500, 0.888889
0.562500, 0.037037
};
save('the_mat_file.mat','x');
S = load('the_mat_file.mat');
len = size( S.x, 1 );
fid = fopen( 'the_text_file.txt', 'w' );
fprintf( fid, '%s\n', 'x={' );
for jj = 1 : len
fprintf( fid, '( %8.6f %8.6f )\n', S.x{jj,:} );
end
fprintf( fid, '%s\n', '};' );
fclose( fid );
and inspect the result
>> type the_text_file.txt
x={
( 0.000000 0.000000 )
( 0.500000 0.333333 )
( 0.250000 0.666667 )
( 0.750000 0.111111 )
( 0.125000 0.444444 )
( 0.625000 0.777778 )
( 0.375000 0.222222 )
( 0.875000 0.555556 )
( 0.062500 0.888889 )
( 0.562500 0.037037 )
};
In response to comments below
The example above produce a text file with LF as new line separator. (See wiki on Newline). Some editors, e.g. Notepad, requires CRLF as new line separator.
To output CRLF you may modify the the fopen statement as proposed by @Walter or use \r\n explicitly in the print statements as in the code below.
x_array.mat contains a double array, not a cell array as I assumed from your question. The code below should do the job.
S = load('x_array.mat');
len = size( S.x, 1 );
fid = fopen( 'the_text_file.txt', 'w' );
fprintf( fid, '%s\r\n', 'x={' );
for jj = 1 : len
fprintf( fid, '( %8.6f %8.6f )\r\n', S.x(jj,:) );
end
fprintf( fid, '%s\r\n', '};' );
fclose( fid );
inspect the text file with Notepad++

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SUSHMA MB
SUSHMA MB on 27 Jul 2017
Thank you for the answer. It works, but can it be in a new line? because everything comes in one line.
Walter Roberson
Walter Roberson on 27 Jul 2017
You must be using MS Windows and you are looking at the file with an obsolete program such as NotePad.
Change the line
fid = fopen( 'the_text_file.txt', 'w' );
to
fid = fopen( 'the_text_file.txt', 'wt' );

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