Generation of Hamming Codes problem

Hi I am analyzing this code from my lab and it doesn't work because matlab can't find this bcd function. I tried typing help bcd and nothing appears. Can anyone tell me a solution how to make this code work? Thank you

 p_err = 0.01;         % bit error probability 
    n       = 7;        % codeword length 
    k       = 4;        % information word length 
    m       = n-k;        % number of parity bits 

 % generate matrix P (parity matrix) 
  P=[]; % initialize P 
    for iC=1:n 
       if (log2(iC)-floor(log2(iC)))>0  % check if position is not 1,2,4,8 
        P = [P bcd(iC,m)'];                        % form P 
       end 
    end 
    echo on
    G = [eye(k),P'];

it gives this error: ??? Undefined function or method 'bcd' for input arguments of type 'double'.

Error in ==> test1 at 10 P = [P bcd(iC,m)']; % form P

Answer 1

[Walter Roberson]

bcd is not a routine supplied by Mathworks in any of their toolboxes. You will need to look again at the location you found that code. For example it might happen to say

The formation of the generator matrix is simply a matter of arranging binary coded decimal
(BCD) vectors of m bits in numerical order, where m=n-k is the number of parity bits.

Hint: binary coded decimal is the same as binary when the values involved are less than 10.

[Shabani Nonda]

Thanks for your reply Walter!