Matlab - Continuacion Cambio de bit

x13 =

   1.0e+12 *

   2.351834201351000

   2.352214734420000

   0.300760467282000

   0.300698386970000

   0.300698386969860

   0.996772019463192

   0.428002489561000

   0.542637058001000

   3.953578773831000

   3.953578773848000

u=dec2bin(x13);

for i=1:size(x13,1)

    A{i}=u(i,:);

end

P3=[];

for i=1:length(A)

    P3=[P3,A{i}];

end

P3

for i=1:length(P3)

    b=str2double(P3(i));

    r=rand;

    if r<0.05;

        P3(i)=num2str(~b);

    end

end

P3mutada=P3