MATLAB: I have data of bags sold one by one and the year its sold is given. I have used unique to get the years sorted. i need the number of bags per year using for loop. bags sold against the year has to be plotted.

Question

sales_year =(data)
years = unique(sales_year);
counter = 0;
for 
%%how do i use a counter to keep adding the sales year each time it encounters it
end

Answer 1

counter = [unique(sales_year), accumarray(sales_year,1)];

or

[g,v] = findgroups(sales_years);
counter = [v,splitapply(@sum,ones(size(g)),g)];

or with loop

y = unique(sales_year);
n = numel(y);
counter = [y,zeros(n,1)];
for ii = 1:n
    counter(ii,2) = sum(y(ii) == sales_year);
end