Numpy savetxt将一维数组保存为列

import numpy as np

# 创建一维数组
arr = np.array([1, 2, 3, 4, 5])

# 将数组保存为列
np.savetxt('output.txt', arr)

1.000000000000000000e+00
2.000000000000000000e+00
3.000000000000000000e+00
4.000000000000000000e+00
5.000000000000000000e+00

import numpy as np

# 创建一维数组
arr = np.array([1, 2, 3, 4, 5])

# 将数组保存为列，指定小数位数为2，分隔符为逗号，行结束符为换行符
np.savetxt('output.txt', arr, fmt='%.2f', delimiter=',', newline='\n')

1.00,2.00,3.00,4.00,5.00