How to detect the repetition of any number in a array?

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Arnab Pal
Arnab Pal on 21 Aug 2017
Say a=[4 5 8 9 4], How to detect this set has repeated numbers? I do not want to know the number, I just want to know that "a set has repeated numbers or not"

Accepted Answer

KSSV
KSSV on 21 Aug 2017
Check unique. If the length of your array and length of unique are not same it has repeated numbers.
a=[4 5 8 9 4] ;
b = unique(a) ;
if length(a)~=length(b)
fprintf('array has repeated numbers\n')
else
fprintf('array has no repeated numbers\n')
end

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