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

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Arnab Pal
Arnab Pal el 21 de Ag. de 2017
Comentada: Prasobhkumar P. P. el 27 de Jul. de 2020
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"

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KSSV
KSSV el 21 de Ag. de 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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