MATLAB: I have a string S=’010101′ I need to take each element from the string and check whether it 1,if it is one then the count is incremented by one in matlab

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I have a string S='010101' I need to take each element from the string and check whether it 1,if it is one then the count is incremented by one in matlab?
I have used the following code,but the value of count is not changing.
St='010101';
count=0;
a=0;
for i=1:6
  a=St(i);
   if(a==1)
       count=count+1;
   end
end

Best Answer

S='010101'
out=nnz(S-'0')
To correct your for loop
St='010101';
count=0;
a=0;
for i=1:6
a=St(i);
 if(a=='1')
     count=count+1;
 end
end
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