我希望合并两个数组...
a = np.array(["A", "B", "C"])
b = np.array(["1", "2", "3", "4", "5"])
放入与此类似的数组(矩阵)中
[["A", "B", "C", "1"]
["A", "B", "C", "2"]
["A", "B", "C", "3"]
["A", "B", "C", "4"]
["A", "B", "C", "5"]]
我已经尝试过for循环,但是它似乎不起作用。我是Python的新手,将不胜感激。 谢谢。
答案 0 :(得分:1)
>>> np.hstack((np.tile(a, (len(b), 1)), b[:, None]))
array([['A', 'B', 'C', '1'],
['A', 'B', 'C', '2'],
['A', 'B', 'C', '3'],
['A', 'B', 'C', '4'],
['A', 'B', 'C', '5']], dtype='<U1')
答案 1 :(得分:1)
这可以解决问题:
import numpy as np
a = np.array(["A", "B", "C"])
b = np.array(["1", "2", "3", "4", "5"])
c=np.hstack([np.broadcast_to(a, shape=(len(b), len(a))), b.reshape(-1,1)])
输出:
[['A' 'B' 'C' '1']
['A' 'B' 'C' '2']
['A' 'B' 'C' '3']
['A' 'B' 'C' '4']
['A' 'B' 'C' '5']]
答案 2 :(得分:0)
也许将Python list comprehension与np.append
一起使用:
>>> [np.append(a,x) for x in b]
[array(['A', 'B', 'C', '1'],
dtype='<U1'), array(['A', 'B', 'C', '2'],
dtype='<U1'), array(['A', 'B', 'C', '3'],
dtype='<U1'), array(['A', 'B', 'C', '4'],
dtype='<U1'), array(['A', 'B', 'C', '5'],
dtype='<U1')]
根据需要,可以将结果包装在np.array
中:
>>> np.array([np.append(a,x) for x in b])
array([['A', 'B', 'C', '1'],
['A', 'B', 'C', '2'],
['A', 'B', 'C', '3'],
['A', 'B', 'C', '4'],
['A', 'B', 'C', '5']],
dtype='<U1')
答案 3 :(得分:0)
一种实现方法是:
import numpy as np
a = np.array(["A", "B", "C"])
b = np.array(["1", "2", "3", "4", "5"])
output=[]
for i in list(b):
a_list=list(a)
a_list.append(i)
output.append(a_list)
output=np.asarray(output)
print(output)
此结果如预期:
[['A' 'B' 'C' '1']
['A' 'B' 'C' '2']
['A' 'B' 'C' '3']
['A' 'B' 'C' '4']
['A' 'B' 'C' '5']]
>>>