Binary data dealing with fread

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Kei Manabe 2018-11-19

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https://ww2.mathworks.cn/matlabcentral/answers/430850-binary-data-dealing-with-fread

评论： Jan 2018-11-20

I have a binary data file. When I look into the file in a Hex editior, I can see a 32 bit Hex value, 'F9 BD FF FF.' When I read it as fread(fid,1,'bit32','ieee-le'), the value is read as -3.448212000000000e+05. I do not understand the calculation. Could you let me know, please?

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Answer 1

Jan 2018-11-20

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https://ww2.mathworks.cn/matlabcentral/answers/430850-binary-data-dealing-with-fread#answer_347977

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I cannot confirm this.

a = uint8(sscanf('F9BDFFFF', '%2X'));
fid = fopen('test.bin', 'w');
fwrite(fid, a, 'uint8');
fclose(fid);
fid = fopen('test.bin');
b = fread(fid,1,'bit32','ieee-le')   % -16903