how swap the bits position of image A(I,j).please correct the mistake.

A= imread('camera man.png');
  k=1:65536;
  for I=1:256;
  for j=1:256;
  x=[0.3,zeros(1,65535)];
  p=0.343;
  for n=2:65536;
  if x(n-1)>=0 & x(n-1)<=p
   x(n)=x(n-1)/p;
  else
   x(n)=(1-x(n-1))/(1-p);
  end
  end
  S=(x*255)+1;
  Q=[0.2,zeros(1,65535)];
  p=0.343;
  for n=2:65536;
  if Q(n-1)>=0 & Q(n-1)<=p
   Q(n)=Q(n-1)/p;
  else
   Q(n)=(1-Q(n-1))/(1-p);
  end
  end
  D=(Q*255)+1;
  L=mod(S,8)+1;
  P=mod(D,8)+1;
  bits = bitget(A(I,j),[L,P]);
  A(I,j)=bitor(bitset(A(I,j),[P,L],bits));
  end 
  end

[Guillaume]

Duplicate. Already answered

[Sultan Mehmood]

butt the error is still in code.so kindly help me in this code

[Guillaume]

I have showed several of the problems in your other question.

These problems have nothing to do with the swapping of the bits. They're much earlier than that.