Command to pad zeros to specific locations in binary numbers?

Question

I need to pad zeros to specific locations in binary numbers. Looping the array form of a binary number such as dec2bin(43) and adding the zeros and adjusting th

Answer 1

Although not much of a conceptual improvement, the following will do automatic re-indexing and assignment of the old values on a pre-padded matrix:

>> xx
xx =
     1     0     1     0     1     1

nPads = length(positions);
nPadsShifts = 1:nPads;           
y = ones(1, length(xx) + nPads); % re-indexing on the new array
y(positions + nPadsShifts) = 0;  % padding values
y(y==1) = xx;                    % set original bit values


>> y
y =
     1     0     0     1     0     0     1     1     0