data analysis(數組組合)

'''
橫向拼接（往右邊添加）hstack  
concatenate((arr1,arr2),axis=1)
縱向拼接（往下面添加）vstack
concatenate((arr1,arr2),axis=0)
'''


import numpy as np

# 數組組合
arr1 = np.arange(6).reshape(2,3)
arr2 = np.array([[10],[20]])
arr3 = np.array([[10,20,30],[0,0,0]])

# 橫向拼接
# arr_new = np.hstack((arr1,arr2))
# arr_n = np.concatenate((arr1,arr2),axis=1)
# print(arr_new)
# print(arr_n)

# 縱向拼接
# arr_new = np.vstack((arr1,arr3))
arr_n = np.concatenate((arr1,arr3),axis=0)
# print(arr_new)
print(arr_n)