Y=cool(8);
subplot(221);bar3(Y,'detached');title('Detached');
subplot(222);bar3(Y,'grouped');title('Grouped');
subplot(223);bar3(Y,'stacked');title('Stacked');
subplot(224);bar3(Y,0.3,'stacked');title('Stacked');
colormap([1,0,0;0,1,0;0,0,1])