按年计算数据的平均值

Question

我从1958年到2016年有几年的数据。我想绘制年平均值与年份的关系。有没有比我做过的更简单的方法？

%Want to make an array of annual averages
avg = [];

for n = 1958:2016

    sum = 0;
    year_counter = 0;

    %there are 708 observations
    for k = 1:708

        %if the year matches, look up the corresponding value and add it to the sum
        if data(k, 1) == n
            sum = sum + data(k,2);
            year_counter = year_counter + 1;
        end

    end

    %append the average to the array
    avg = [avg s/year_counter];

end