Negitive number from a hex value

38 views (last 30 days)
Duke
Duke on 29 Jan 2014
Answered: Walter Roberson on 4 Feb 2014
If I go into the windows calculator and type in -69 in decimal and I convert that to hex I get FFFFFFBB. If I go into MatLab and I type int32(hex2dec('FFFFFFBB')) I get 2147483647. Is there any way that I can take a hex value and get the negative representation of the value, so I’d like FFFFFFBB in MatLab to give me -69. Thanks!
  1 Comment
Duke
Duke on 4 Feb 2014
Anyone know anything about this, or understand what I'm asking?

Sign in to comment.

Accepted Answer

Walter Roberson
Walter Roberson on 4 Feb 2014
typecast(uint32(hex2dec('FFFFFFBB')),'int32')

More Answers (1)

Thomas
Thomas on 4 Feb 2014
Edited: Thomas on 4 Feb 2014
2147483647 is Maximum integer value in matlab
you can get that by typing
intmax
so the answer you are getting is not value out of hex2dec but the intmax.
You can use Two's complement to represent negative numbers.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!