Convert Decimal to Binary Vector

Question

I need to convert a Decimal Number to a Binary Vector

For example, Something like this:

  length=de2bi(length_field,16);

Unfortunat

Answer 1

Here's a solution that is reasonably fast:

function out = binary2vector(data,nBits)

powOf2 = 2.^[0:nBits-1];

%# do a tiny bit of error-checking
if data > sum(powOf2)
   error('not enough bits to represent the data')
end

out = false(1,nBits);

ct = nBits;

while data>0
if data >= powOf2(ct)
data = data-powOf2(ct);
out(ct) = true;
end
ct = ct - 1;
end

To use:

out = binary2vector(12,6)
out =
     0     0     1     1     0     0

out = binary2vector(22,6)
out =
     0     1     1     0     1     0