Binary data dealing with fread

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?

Answer 1

[Jan]

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

Please post some code, which reproduces your observations.

[Jan]

Kei Manabe wrote: I have tried your code and got same result. Finally, I have found the code

"y = y*20.4;"

at around the end of the code lol...

Thank you so much for your cooperation!!