更新 function.py
Gitea Actions Experiment Test / Experiment-Actions (push) Successful in 21s

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2024-10-16 22:31:22 +08:00
parent 62208380f5
commit b31ecb5f02
+31 -5
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@@ -1,4 +1,3 @@
# function.py
import numpy as np
import os
@@ -21,12 +20,11 @@ import os
- numpy: 2.1.1
"""
"""
请在这里填写学号和姓名,不填写即成绩无效。
"""
id = "202210423xxx"
name = "test_name"
id = "20221042303"
name = "赵昊龙"
"""
@@ -41,7 +39,7 @@ name = "test_name"
# 这里写自己的代码实现
def classify(input_vector, dataSet, labels, k=0):
def classify(input_vector, dataSet, labels, k=3):
"""
KNN 分类算法。
@@ -54,6 +52,22 @@ def classify(input_vector, dataSet, labels, k=0):
Returns:
- int: 预测的分类标签。
"""
# 计算输入向量与数据集中每个向量的欧式距离
distances = []
for i in range(dataSet.shape[0]):
dist = np.sqrt(np.sum((input_vector - dataSet[i]) ** 2))
distances.append((dist, labels[i]))
# 根据距离进行排序,取前k个最近邻
distances.sort(key=lambda x: x[0])
k_nearest_labels = [label for _, label in distances[:k]]
# 统计前k个最近邻中出现次数最多的标签
from collections import Counter
label_counts = Counter(k_nearest_labels)
most_common_label = label_counts.most_common(1)[0][0]
return most_common_label
# 这里也写自己的代码实现
@@ -68,6 +82,17 @@ def load_dataset(directory):
- np.array: 特征数据。
- np.array: 标签数据。
"""
training_file_list = os.listdir(directory)
training_matrix = []
training_labels = []
for file in training_file_list:
class_num = int(file.split('_')[0])
vector = img_to_vector(os.path.join(directory, file))
training_matrix.append(vector)
training_labels.append(class_num)
return np.array(training_matrix), np.array(training_labels)
# 这里还写自己的代码实现
@@ -82,6 +107,7 @@ def img_to_vector(filename):
Returns:
- np.array: 二值图像向量。
"""
return np.array([int(pixel) for pixel in open(filename).read().split()])
if __name__ == "__main__":