MATLAB: How to add MEAN to Boxplot

boxplotpatchskew

I am thinking about locating MEAN as a straight horizontal line or a symbol inside the boxplots for illustration purposes. I would say it is possible since distributions are not significantly skewed. Any suggestions?!
Here is a MATLAB sample code:
rng default  % For reproducibility
x1 = normrnd(5,1,100,1);
x2 = normrnd(6,1,100,1);
figure
boxplot([x1,x2],'Notch','on','Labels',{'mu = 5','mu = 6'})
title('Compare Random Data from Different Distributions')
cust_colr = [0, 0.5, 1
    0.60156, 0.80078, 0.19531
    0.5, 0, 0];
h = findobj(gca,'Tag','Box');
 for j=1:length(h)
     patch(get(h(j),'XData'),get(h(j),'YData'),cust_colr(j,:));
 end
Output picture is shown below:

Best Answer

The ability to plot the mean values using boxplot is not available as of release R2016b. To work around this issue, you can find these values and plot them manually. The example below shows how to plot the mean value of each group:
 % Generate random data
 X = rand(10);
 % Create a new figure and draw a box plot
 figure;
 boxplot(X)
 % Overlay the mean as green diamonds
 hold on
 plot(mean(X), 'dg')
 hold off
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