function bar531

figure(1)
x=-2.9:0.2:2.9;
bar(x,exp(-x.*x),'r')

figure(2)
Y = round(rand(5,3)*10);
subplot(2,2,1)
bar(Y,'group')
title 'Group'
subplot(2,2,2) 
bar(Y,'stack')
title 'Stack'
subplot(2,2,3)
barh(Y,'stack')
title 'Stack'
subplot(2,2,4)
bar(Y,1.5)
title 'Width = 1.5'