MATLAB: Frequency determination

countfrequencyhistc

Hi I have a matrix as follows:

A=[1 2 3; 2 3 2; 1 2 3]

I need to determine the frequency of the matrix value. i.e.

the frequency of 1 is 2 the frequency of 2 is 4 the frequency of 3 is 3

How to do this easily.

c = histc(A(:),unique(A))

A = [ 1 1 4 3 3 3 3 2 4 1 ]
[ii,jj,kk]=unique(A)
freq=accumarray(kk,1)
out=[ii' freq]

%or

freq=hist(A,1:4)

A == round(A)

That will give a 1 for integers. You can add a test for positiveness if you want it.