对numpy数组中具有某一最小频率的元素进行滤波

import numpy as np

def filter_elements_with_min_frequency(arr, min_frequency):
    unique_elements, element_counts = np.unique(arr, return_counts=True)
    filtered_elements = unique_elements[element_counts >= min_frequency]
    filtered_arr = arr[np.isin(arr, filtered_elements)]
    return filtered_arr

# 示例用法
arr = np.array([1, 2, 3, 2, 4, 1, 5, 2, 3, 4, 2, 1])
min_frequency = 2
filtered_arr = filter_elements_with_min_frequency(arr, min_frequency)
print(filtered_arr)