# 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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Anushka on 7 Jul 2015
Commented: Steven Lord on 7 Jul 2015
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
##### 3 CommentsShow 1 older commentHide 1 older comment
Thorsten on 7 Jul 2015
Or
sum(double(St) == double('1'))
or
numel(findstr(St, '1'))
Steven Lord on 7 Jul 2015
Or, with no arithmetic (besides NNZ's counting):
nnz(str == '1')

Azzi Abdelmalek on 7 Jul 2015
Edited: Azzi Abdelmalek on 7 Jul 2015
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

### More Answers (1)

Debarati Banerjee on 7 Jul 2015
This seems to work:
St='010101';
count=0;
a=0;
for i=1:6
a=St(1,i);
if(str2num(a)==1)
count=count+1;
end
end
Anushka on 7 Jul 2015
Thank you Mam,it also worked.