Binary to decimal using recursion

Question

Rick 2014-8-12

回答： Salaheddin Hosseinzadeh 2014-8-12

Hello, I'm trying to figure out how to write a function that will convert binary to decimal using recursion. BA is a 1 x n array of binary digits

function y = Bin2dec(BA)
n = length(BA);
if n == 1
    y = BA;
else
    y = Bin2dec(BA(n-1));
end

but I can't figure out the recursive part

Answer 1

Hi Rick,

You're aware of the MATLAB built in bin2dec function ain't u?

I've no idea if it's possible to call "Bin2dec" function from "Bin2dec" function?!!!

change the function name so that it won't interfere with matlab function

function y = _bin2dec(BA) 
 y = 0; BA = num2str(BA); 
 for n = 1:length(BA) 
      y = y + str2num(BA(n))^n-1; 
 end 
end

hopefully that will do! ;)

Good Luck