HOW CAN A .DAT FILE BE EDITED

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Ahmed Abed 2017-6-8

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评论： Ahmed Abed 2017-6-9

Hi; I trying to change a certain number in a DAT file, the file consists of numbers and text as shown

The problem is every time I edit the file using commands like fprintf to overwrite the file, the external programme that supposes the read and executes the file gives me an error because it is not able to read the file anymore. please, is there a way to edit and save the file while it is still readable? Thanks

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Ahmed Abed 2017-6-8

编辑：dpb 2017-6-8

在 MATLAB Online 中打开

Hi, thanks for your help and sorry about that. Before doing any coding with Matlab, I opened the DAT file using notepad++ and modified manually some data, then I run the external programme and it worked. then I tried to do the same thing with Matlab as following

delete('strain determination 01.DAT');
fileID = fopen('strain determination 01.DAT','w');
fprintf(fileID,'%s\n','1  (1) NPROB');
fprintf(fileID,'%s\n','pavement management system');
fprintf(fileID,'%s\n',' 1  0  1  1  (3) MATL NDAMA NPY NLG');
fprintf(fileID,'%s\n',' 0.001  (4) DEL');
fprintf(fileID,'%s\n',' 4  1  80  9  1  (5) NL NZ ICL NSTD NUNIT');
fprintf(fileID,'%s\n',' 5   25   25   (6) TH');
fprintf(fileID,'%s\n',' 0.35   0.35   0.35   0.35   (7) PR');
fprintf(fileID,'%s\n',' 5   (8) ZC');
fprintf(fileID,'%s\n',' (9) NBOND');
fprintf(fileID,'%s\n',' 6000000 1000000  150000  50000  (11) E');
fprintf(fileID,'%s\n',' 0   (13) LOAD');
fprintf(fileID,'%s\n',' 600   (14) CR CP');
fprintf(fileID,'%s\n',' (16) NR');
fprintf(fileID,'%s\n',' (17) RC');
fclose(fileID);
  end

this is exactly what the external programme reads, however, it can not read the file created this way. I am not sure why. please, is there any way to fix this situation? thanks

Jan 2017-6-9

编辑：Jan 2017-6-9

As we see in this screenshot, you try to attach a .rar file. The error message tells clearly, that this is not supported, but a .zip file would work and .txt files also.

Nevertheless, your problem is solved and attaching the file is not needed anymore.

Instead of using 'wt' in fopen, you can replace the line breaks also by '\r\n'. Beside the Editor shipped with Windows, your application seems to require the DOS linebreaks. What a pitty.

Ahmed Abed 2017-6-9