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how to convert to binart file

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sandy
sandy 2014-4-8
评论： Walter Roberson 2014-4-9
given below is the values which i need to process.for that i need to save this as binary format. also i need to save as .tim format only..or any suggestions ..plz
7.543390 7.440341 35.278316 22.194822 978.857422 3.522650
7.543390 7.488090 35.278316 22.210081 978.857422 3.523718
7.527206 7.488090 35.293575 22.194822 978.857422 3.521430
7.527206 7.488090 35.293575 22.210081 978.857422 3.522803
7.527206 7.488090 35.293575 22.194822 978.857422 3.524024
7.527206 7.488090 35.293575 22.194822 978.875732 3.520972
7.527206 7.488090 35.293575 22.194822 978.857422 3.522955
7.527206 7.509514 35.293575 22.194822 978.875732 3.523566
7.532593 7.509514 35.293575 22.194822 978.875732 3.521430
7.532593 7.509514 35.293575 22.179564 978.875732 3.523261
7.532593 7.509514 35.293575 22.194822 978.875732 3.523871
output will be like this..
>Wi@hFy@éoBVåAÇpD–v@ @•z@@•z@@•z@@•z@@•z@@•z@

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回答（1 个）

Walter Roberson
Walter Roberson 2014-4-8
fid = fopen('YourFileNameHere', 'w');
fwrite(fid, YourMatrix, 'float32');
fclose(fid);
Note: you might need to pass transpose(YourMatrix)
I did not research .tim format; the file output format might be more complex than this.
dec2bin is not appropriate for this task.
  2 个评论
sandy
sandy 2014-4-9
编辑：sandy 2014-4-9
thanks..but if i use float32..it showing error....below is my code...
path_02='C:\Users\Desktop\sample';
path_01='C:\Users\Desktop\sample\output';
a = dir(fullfile(path_02, '*.tim'));
for i = 1:numel(a)
filename_in = fullfile(path_02, a(i).name);
fid = fopen(filename_in,'r');
ascii = fread(fid, [42,21000], 'float32');
data_values=ascii';
out = fopen(fullfile(path_01, a(i).name),'w');
fwrite(out, data_values,'float32');
fclose(out);
fclose(fid);
end
this is error im getting...
Error using fwrite
Invalid file identifier. Use fopen to generate a valid file identifier.
Error in my_sample (line 14)
fwrite(out, data_values);
Walter Roberson
Walter Roberson 2014-4-9
your fopen() is failing when you want to fwrite(). You should be checking the output file identifier ("out" in your code), and you should consider printing out the reason code
[out, msg] = foen(fullfile(path_01, a(i).name),'w');
if out < 0
fprintf(2, 'Open to write failed because: %s\n', msg);
else
....
end

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