如何更改轴图，子图的大小？

Question

x =np.random.random_integers(10,400,20)
y = np.random.random_integers(1,600,20)
fig,ax = plt.subplots(ncols=3,nrows=2)
fig_for_all = plt.figure(figsize=(10,5))
ax[0,1].scatter(x,y,c='green', marker='*')
ax[0,2].scatter(y,x,c='red', marker = "8")
ax[1,0].bar(x,y)
ax[1,2].scatter(y,y*x, c='black', linewidth=3, marker='2')
ax[1,1].scatter(x,y, c = 'pink',marker = '3')

figsize = 10,5不起作用，子图保持很小。