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Negitive number from a hex value

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Duke
Duke el 29 de En. de 2014
Respondida: Walter Roberson el 4 de Feb. de 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!
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Duke
Duke el 4 de Feb. de 2014
Anyone know anything about this, or understand what I'm asking?

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Walter Roberson
Walter Roberson el 4 de Feb. de 2014
typecast(uint32(hex2dec('FFFFFFBB')),'int32')

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Thomas
Thomas el 4 de Feb. de 2014
Editada: Thomas el 4 de Feb. de 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.
the following link might help http://www.physicsforums.com/showthread.php?t=157612

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