11 Array stitching of Python Numpy library

11 Array stitching

Create array

Random = np.random.randint(1, 15, size = 6)
Random1 = np.random.randint(1, 10, size = 6)
Random2 = np.random.randint(1, 10, size = 6)
Random3 = np.random.randint(1, 10, size = 6)
print(Random)

a = np.array([Random, Random1])
print(a)

b = np.array([Random2, Random3])
print(b)


  # b = np.random.randint(1, 10, size = 20)

Vertical stitching

v = np.vstack([a, b])
v1 = np.vstack((a, b))
print(v)
print(v1)

Horizontal stitching

r = np.hstack([a, b])
r1 = np.hstack((a, b))
print(r)
print(r1)
print("\\"*30)

Concatenate along the axis

# axis=0 时为默认情况，供垂直方向拼接 相当于vstack
r1 = np.concatenate((a,b), axis = 0)
r2 = np.concatenate((a, b))
print(r1)
print(r2)

# 二维数组有两个轴 axis = 0   axis = 1
print('axis = 1 水平方向拼接 相当于hstack')
r3 = np.concatenate((a,b),axis = 1)
print(r3)

##三维数组有三个轴 axis = 0， 1， 2
a = np.arange(1,13).reshape(1, 2, 6)
print(a, a.shape)
b = np.arange(101, 113).reshape(1, 2, 6)
print(b, b.shape)

# 三维 axis = 0
r1 = np.concatenate((a, b), axis = 0)
print(r1, r1.shape)

# 三维 axis = 1
r2 = np.concatenate((a, b), axis = 1)
print(r2, r2.shape)