Write binary file in Matlab

조회 수: 5 (최근 30일)
Haoliang Yu
Haoliang Yu 2019년 9월 13일
댓글: Image Analyst 2019년 9월 14일
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.

답변 (2개)

James Tursa
James Tursa 2019년 9월 13일
Can you read and write as “STREAM” in your FORTRAN compiler? No header stuff to worry about.
  댓글 수: 1
Haoliang Yu
Haoliang Yu 2019년 9월 13일
Yep, that is something I will do today.

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Image Analyst
Image Analyst 2019년 9월 13일
Maybe try changing the ENDIAN?
  댓글 수: 4
Haoliang Yu
Haoliang Yu 2019년 9월 13일
Oh, I did, but forgot that part when I paste the code here...also I worked around this problem by changing the Fortran write and read code to STREAM.
Image Analyst
Image Analyst 2019년 9월 14일
A paste operation shouldn't drop out characters that were copied into the clipboard. You might want to investigate that.

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