Consider the code below but also check the documentation for:
X=[0 0 1 2 0 1 1 0];
Y=[1 1 1 1 2 0 0 2];
% find the freqency vector
minVal = min(Y)
maxVal = max(Y)
vectorOfvalues = minVal:maxVal
howMany = Y'==vectorOfvalues
howManySum = sum(howMany);
% this line nicely show how the occurance of a value
% 1st row: value
% 2nd row: occurance
howManySum = [vectorOfvalues; howManySum]
% pre-allocation
occurence = zeros(1,length(Y));
for i=1:length(howManySum)
occurence(Y==howManySum(1,i)) = howManySum(2,i);
end
Y
occurence
% I've added the factor of 50 for the occurance
% so the diffrence between the dot sizes is visible
figure
scatter(X,Y,50*occurence)
