Try this:
binstr = char(randi([0 1]+'0', 1, 96)); % Create (Random) Binary Character Vector
binstr8 = reshape(binstr, [], 8); % Reshape To (12x8) Character Array
binmtx = bin2dec(binstr8); % Convert Binary Character Array To Decimal Column Vector
chrmtx = char(binmtx); % Convert Decimal Column Vector To Character Column Vector
You can combine these into one line if you want to. I kept them separate to demonstrate how the code works.
EDIT — (1 Jan 2020 at 18:13)
chrmtx = @(x) char(bin2dec(reshape(x(:).',[],8))); % One-Line Anonymous Function Version Of This Code
Out = chrmtx(binstr);
