两个长度不同的数组之和

import numpy as np

# 示例数组
arr1 = np.array([1, 2, 3])
arr2 = np.array([4, 5, 6, 7])

# 填充法
arr2_padded = np.pad(arr2, (0, len(arr1) - len(arr2)), 'constant')
result_fill = arr1 + arr2_padded
print("填充后相加结果:", result_fill)

# 截取法
arr1_trimmed = arr1[:len(arr2)]
result_trim = arr1_trimmed + arr2
print("截取后相加结果:", result_trim)

import numpy as np

# 示例数组
arr1 = np.array([1, 2, 3])
weights = np.array([0.5, 0.5])

# 广播法
result_broadcast = arr1 * weights
print("广播后相加结果:", result_broadcast)

# 重复权重
weights_repeated = np.tile(weights, (len(arr1) // len(weights) + 1))[:len(arr1)]
result_repeat = arr1 * weights_repeated
print("重复权重后相加结果:", result_repeat)