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

3 views (last 30 days)
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 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')
fprintf('array has no repeated numbers\n')

More Answers (0)


Find more on Creating and Concatenating Matrices in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by