Hi Christina,
I think this behaviour is because boxplot resets the axes limits, and you are not setting them back to see both the boxplots.
x = rand(5,1);
y = rand(10,1);
z = rand(15,1);
Xpos = [2 5 12];
group = [repmat(Xpos(1), 5, 1); repmat(Xpos(2), 10, 1); repmat(Xpos(3), 15, 1)];
data=[x;y;z];
figure
boxplot(data, group,'positions', Xpos,'colors','k')
hold on
x =2+ rand(5,1);
y = 2+rand(10,1);
z = 2+rand(15,1);
Xpos = [3 6 12];
group = [repmat(Xpos(1), 5, 1); repmat(Xpos(2), 10, 1); repmat(Xpos(3), 15, 1)];
data=[x;y;z];
boxplot(data, group,'positions', Xpos,'colors','r')
But, I suspected that this could be because the x and y axes limits are different for the second box plot, and thus added the following two lines to the above code:
ylim([0 4])
xlim([0 15])
And voila! I could see both the plots!
From the y axes values which you have mentioned in the question, it looks like this is the issue. So try this out!
Cheers!
Abhiram
