Stacking Matrix pemrograman python

import numpy as np

a = ([1,2,3])

b = ([4,5,6])

aMat = np.zeros ((2,3))

bMat = np.ones ((2,3))

# stacking matriks, menumpuk matriks

c = np.hstack ((a,b))

d = np.vstack ((a,b))

cMat = np.hstack ((aMat,bMat))

dMat = np.vstack ((aMat,bMat))

print (c)

print (d)

print (cMat)

print (dMat)