Write binary file in Matlab
6 views (last 30 days)
Show older comments
Hello,
I have a binary data generated by Fortran, I am able to read my data:
fid = fopen('inflow.data0000');
sep1=fread(fid,1,'float');
nynzitime=fread(fid,3,'int32');
sep=fread(fid,1,'int32');
RAW_read = fread(fid, 3*n1*n2,'float32');
RAW = reshape(RAW_read, [n1,n2,3]);
fclose(fid);
I need to make some changes in the data and then write it out as a binary file for Fortran.
so I did this:
fileID = fopen('newinflow.data0000')
fwrite(fileID,sep1,'single');
fwrite(fileID,nynzitime,'int32');
fwrite(fileID,sep,'int32');
fwrite(fileID,RAW_read,'float32');
fclose(fileID);
then when Fortran reads the data:
namel='newinflow.data0000'
open(30,file=namel,form='unformatted')
read(30)n2al,n3l
read(30)qal(0:n2al+1,1:n3l,1:3)
close(30)
error message shows "corrupted file". I realized that it is a header/format related issue, but I am not familar with binary file, tried a few different things, no luck yet.
I attached a 'good' binary data, please see if you know how to read and write it properly for Fortran.
Thank you for your time.
0 Comments
Answers (2)
James Tursa
on 13 Sep 2019
Can you read and write as “STREAM” in your FORTRAN compiler? No header stuff to worry about.
Image Analyst
on 13 Sep 2019
Maybe try changing the ENDIAN?
4 Comments
Image Analyst
on 14 Sep 2019
A paste operation shouldn't drop out characters that were copied into the clipboard. You might want to investigate that.
See Also
Categories
Find more on Fortran with MATLAB in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!