Making complex(ish) bar graphs?

Second question of the day, I have a single set of values on the y axis (in this case lengths from 10-20 "units), and then I have 4 different items I want on the x axis (preferably in different colors), and I want them to be grouped in pairs (for easy comparison). How would I go about doing this?

Answer 1

[Grzegorz Knor]

Something like this:

y = rand(4,1)*10+10;
bar([1,2],y(1:2),'r')
hold on
bar([3.5,4.5],y(3:4),'g')
set(gca,'xtick',[1 2 3.5 4.5],'xticklabel',{'A','B','C','D'})
ylabel('length [a.u.]')

?

See also:

http://www.mathworks.com/matlabcentral/answers/15298-color-histogram-as-a-function-of-x-axis

http://www.mathworks.com/support/solutions/en/data/1-1T6UHS/