How to find if a vector has a repetitive element or not? And its repetition number

For example

A=[ 1 3 1 1 2 3 5]

[Torsten]

What is "repetition number" ? The number of repetitions of each element of A ?

[IBM watson]

Yes. I was trying to say that

Answer 1

[Torsten]

[a,b] = histc(A,unique(A));
count = a(b)

returns the number of occurences of each element in vector A in array "count".

Best wishes

Torsten.

[IBM watson]

Thanks !

[IBM watson]

Actually i want to use your code for this:

https://www.mathworks.com/matlabcentral/answers/425580-setdiff-comand-usage?s_tid=mlc_ans_email_view#answer_342895