findout the repeating element and the no of time of repeated in a matrix

i do have a matrix

A=[1,2,3,4,5,5,6,7,8,8,8, 9]

how can i find the repeating values and the no of times it is repeated. answer i expected is

repeatvalues=[5, 8]
Nooftimerepeated=[2,3]

[Image Analyst]

Are the numbers always integers? Or can they be fractional/irrational numbers? (It makes a difference.)

Answer 1

[Andrei Bobrov]

A=[1,2,3,4,5,5,6,7,8,8,8, 9]

a = unique(A); 
b = histc(A,a);
t = b > 1;
repeatvalues = a(t);
Nooftimerepeated = b(t);