How to add three legends of a bar graph in matlab?

Question

i have a bar graph which calculates precession and recall for three different methods and represents them in three different colors, code i used is as follows

x=[0.4,0.31,0.21]
y=[0.45,0.38,0.27]
bar(x,y,0.1)
h = bar(x,diag(y),0.1,'stacked');
xlabel('precession')
ylabel('recall') 

i want to add a legend that should show maroon color is for indiscernible relation, green is for discernible relation and blue is for equivalence relation

Answer 1

Try this:

legend('indiscernible relation','cernible relation' ,'equivalence relation')

Colors will be automatically inserted to the legend