Bit Flip-Bit Negation

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Sal
Sal 2011-8-29
Hi, There is a way to do a single or multiple bit flip. For bit flip i mean the negation of only that bit in a decimal number. for example: bitflip(8,2) = 10 this should mean a negation on second bit of 8. Thank You

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Walter Roberson
Walter Roberson 2011-8-29
bitflip = @(val, n) bitxor(val, 2.^(n-1));

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Paulo Silva
Paulo Silva 2011-8-29
d=8; %decimal value
p=2; %position of the bit to flip
b=dec2bin(d); %convert to binary
%b(p)=num2str(~str2num(b(p))); %flip the bit (wrong place)
b(numel(b)+1-p)=num2str(~str2num(b(numel(b)+1-p))); %flip the bit
dbf=bin2dec(b); %convert to decimal and here you have your result

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