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Convert 32 bit HEX to signed floating point

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So far I use the function hexsingle2num to convert a double type number (i.e. 41c1999a = 24.200000762939453) but when I want to use the same to convert ffffffff it gives me NaN, then I have to manually use nhex2dec('ffffffff',32) = -1 (correct answer),same with another example C0728F5C = -3.79. What I am looking for is a way to automatise this process since I have thousands of values. Is there a function in matlab that includes the conversion of HEX to SIGNED floating point?

Accepted Answer

Maitreyee Mordekar
Maitreyee Mordekar on 13 Nov 2017
Edited: KSSV on 10 Dec 2019
Hi,
By hexsingle2num function I assume that you are referring to the following File Exchange submission: https://www.mathworks.com/matlabcentral/fileexchange/6927-hexsingle2num
This is one of the several submissions in MATLAB File Exchange on MATLAB Central which is a forum for our product users to interact, exchange information and knowledge, without MathWorks' involvement. You may contact the author of this submission directly for specific questions about the implementation.
However, you can obtain the same results using the following function:
typecast(uint32(hex2dec('C0728F5C')),'single')
Also, if you still need a way to convert hexstring to double precision number then you can consider using hex2num: https://www.mathworks.com/help/matlab/ref/hex2num.html
Hope that helps!
  5 Comments
Badr Sahib
Badr Sahib on 30 Nov 2022
Hi,
can you please rearrange your command so that i give -3.79 and i can get 'C0728F5C'.

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