fprintf row indentation export

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curoi
curoi 2013-9-7
I'm having trouble correctly exporting a custom text file I need. When I use fprintf within a for loop, I am getting strange formatting issues with spacing occuring before the beginning of every 5th row starting with row 6.
fileout = 'q.txt';
fid2 = fopen( fileout, 'w' );
for row = 1:5:n;
fprintf( fid2, ' %s %s %s %s\r\n', rough_cell{ row, : } );
fprintf( fid2, ' %s %s %s %s\r\n', rough_cell{ row+1, : } );
fprintf( fid2, ' %s %s %s %s\r\n', rough_cell{ row+2, : } );
fprintf( fid2, ' %s %s %s %s\r\n', rough_cell{ row+3, : } );
fprintf( fid2, ' %s %s %s\r\n', rough_cell{ row+4, : } );
end
fclose( fid2 );
Here is a sample of what the output text file looks like. Every 5th row aside from the 1st row is indented by about 8 spaces. I cannot figure out why my code is doing this. If I eliminate the last, shorter fprintf line within the for loop, I don't have this problem. However, I need to have every fifth row in output as well as the remaining alternating first four rows. As can be seen, there is no additional spacing in the formatSpec (just 1 space). I've also checked the rough_cell cell array and there is no additional spacing for the first column of every fifth row.
-9.9900000E+02 -9.9900000E+02 -9.9900000E+02 -9.9900000E+02
-9.9900000E+02 -9.9900000E+02 -9.9900000E+02 -9.9900000E+02
-9.9900000E+02 -9.9900000E+02 -9.9900000E+02 -9.9900000E+02
-9.9900000E+02 -9.9900000E+02 -9.9900000E+02 -9.9900000E+02
-9.9900000E+02 -9.9900000E+02 -9.9900000E+02
-9.9900000E+02 -9.9900000E+02 -9.9900000E+02 -9.9900000E+02
-9.9900000E+02 -9.9900000E+02 -9.9900000E+02 -9.9900000E+02
-9.9900000E+02 -9.9900000E+02 -9.9900000E+02 -9.9900000E+02
-9.9900000E+02 -9.9900000E+02 -9.9900000E+02 -9.9900000E+02
-9.9900000E+02 -9.9900000E+02 -9.9900000E+02
-9.9900000E+02 -9.9900000E+02 -9.9900000E+02 -9.9900000E+02
-9.9900000E+02 -9.9900000E+02 -9.9900000E+02 -9.9900000E+02
-9.9900000E+02 -9.9900000E+02 -9.9900000E+02 -9.9900000E+02
-9.9900000E+02 -9.9900000E+02 -9.9900000E+02 -9.9900000E+02
-9.9900000E+02 -9.9900000E+02 -9.9900000E+02
-9.9900000E+02 -9.9900000E+02 -9.9900000E+02 -9.9900000E+02
Any ideas?
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dpb
dpb 2013-9-9
num2str( rough.blk, '%9.7E')
I didn't dig thru it all entirely, but it's possible the ill-formed format string could possibly contribute to the problem.
An E format w/ a precision of 7 digits needs a minimum of 14 spaces for the field accounting for the sign place, a leading digit, the decimal and the four for the exponent. Not sure what C (hence Matlab) does when there isn't enough room...
Walter Roberson
Walter Roberson 2013-9-9
The 9 would be the minimum width, and more width will be silently used if needed to satisfy the precision and format specifier.

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Walter Roberson
Walter Roberson 2013-9-8
Change
fid2 = fopen( fileout, 'w' );
to
fid2 = fopen( fileout, 'wt' );
and remove the \r from each of the format strings.
Note: how it shows up will depend on which method you use to output it. Not all MS Windows operations know that \r\n is to be treated together as a single newline.
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curoi
curoi 2013-9-10
编辑：curoi 2013-9-10
I went back and modified the T(1:1350) output above because there were apparently still issues with copying into the message board. You'll notice that there really is an extra space (3) between a positive value and the preceding string (The 0.040 doesn't line up but the 0.024 does). In addition, there are only 6 spaces in front of the beginning of offending sixth set instead of 8 now. Due to the message board, all 2 spaces at the beginning of each line are dropped out but do actually appear in my text and T(1:1350) + 0 output above.
Anyway, I went back to check the rough_cell cell array and at the end of every sixth line there are 5 blank cells which is why the preceding line you mentioned is short by 5 entries out of 12. I did this knowing that I only needed 7 values in the last line and I believed I could just specify that in the fprintf command separately from the other sets (lines) of strings. If I can't do that, should I just fill each of those missing cells with some arbitrary number of the same size and keep my fprintf specification at only 7 strings?
curoi
curoi 2013-9-10
编辑：curoi 2013-9-10
I figured out the problem. It was just that in my fprintf, I was specifying all 12 rows for the short 7 string line by using ':' instead of '1:7'.

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