what function to use to find frequency of values in set?

How do I find number of occurence of a certain number in a set.

I have

R12= [5 6 1 2 6 1 2 1 2 6 5 2]

I need to find frequency of occurs of each number

Answer 1

[Star Strider]

Try this:

R12= [5	6	1	2	6	1	2	1	2	6	5	2];

[R12u,~,ix] = unique(R12(:),'stable');
Number = R12u;
Count = accumarray(ix,1);

Result = table(Number, Count)

producing:

Result =

  4×2 table

    Number    Count
    ______    _____

      5         2  
      6         3  
      1         3  
      2         4  

.

[BigWaffle]

This worked great! thanks

[Star Strider]

My pleasure!

Answer 2

[William]

... or maybe histcounts(R12) to get a histogram.

Answer 3

[Image Analyst]

You could use histcounts:

R12= [5	6	1	2	6	1	2	1	2	6	5	2];
edges = [unique(R12), inf]
counts = histcounts(R12, edges)