How to find first non repeated (unique) character in a string?

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I have already tried to find a Matlab function for this but doesnt seem to be one apart from 'unique' which only eliminates duplicates. Any ideas for code on how to do this?
For example, an input of 'hello' would return h or an input of 'radar' would return d.
The unique characters in 'hello' are h,e and o with h being the first in line
The unique character in 'radar' is only d and so this would also be the first
Any help would be appreciated

Accepted Answer

madhan ravi
madhan ravi on 14 Feb 2019
u=unique(s,'stable'); % where s is your input
Z=arrayfun(@(x)nnz(s==u(x)),1:numel(u));
Result=u(find(Z==1,1,'first'))

More Answers (1)

Andrei Bobrov
Andrei Bobrov on 14 Feb 2019
z = 'hello';
[a,~,c] = unique(z,'stable');
out = a(find(accumarray(c,1) == 1,1));

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