Counting the number of occurences in an array

This was my assignment:

The script should roll five dice 
(the command randi(6, [1 5]) should prove handy) 
and decide if the roll includes three, 
four or five of the same number. 
Recall the potential use of sort and 
diff in answering questions like this,

The script should roll all five dice 100000 times 
and produce the following percentages:
- Percentage of rolls achieving five of a kind (Yahtzees)
- Percentage of rolls achieving four of a kind
- Percentage of rolls achieving three of a kind
- Percentage meeting none of the above

This is what I have so far:

tracker = 0;
%for ii = 1 : 100000
tracker = tracker + 1;
roll = randi(6, [1 5])
roll_sorted = sort(roll)
difference = diff(roll_sorted)
ctr = 0;
for jj = 1 : 4
    if difference(jj) == 0
        ctr = ctr + 1;
    else
        ctr = ctr;
    end
end

Answer 1

[Image Analyst]

Why not simply use histcounts() or histogram()? (Or hist() or histc() if you're using an old version of MATLAB?)

And why not do all 100000 rolls at the same time?

allRolls = randi(6, [5, 100000]);