如何使用pylab在python中合并图形？

Question

这是我要合并的两个图表。如何使用matplotlib合并它们

from numpy import linspace
from pylab import *
P = linspace(1,2,100)
for i in range(0,100):
    v.append(i)
    v[i] = v1
plot(v,P)
show()

T2 = (P2*10**5*v1)/R
v3 = (R*T2)/(P1*10**5)
vv = linspace(v1,v3,100)
for i in range(0,100):
    Pa.append(i)
    Pa[i] = P1
plot(vv,Pa)
show()