generated from LufsX/Experiment-LogReg
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+26
-6
@@ -21,12 +21,14 @@ import numpy as np
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"""
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请在这里填写学号和姓名,不填写即成绩无效。
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"""
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id = "202210423xxx"
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name = "test_name"
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id = "202210423117"
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name = "程悦"
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def sigmoid(z):
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return 1.0 / (1 + np.exp(-z))
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# 这里写自己的代码实现
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def train_logreg(X, y, other_params="你自己设置一些其它参数"):
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def train_logreg(X, y, learning_rate=0.01, iterations=1000):
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"""
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对率回归训练函数。
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@@ -38,7 +40,14 @@ def train_logreg(X, y, other_params="你自己设置一些其它参数"):
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Returns:
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- numpy array: 训练得到的权重。
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"""
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m, n = X.shape
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weights = np.zeros(n)
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for i in range(iterations):
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z = np.dot(X, weights)
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h = sigmoid(z)
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gradient = np.dot(X.T, (h - y)) / m
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weights -= learning_rate * gradient
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return weights
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def predict_logreg(inX, weights):
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"""
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@@ -51,7 +60,9 @@ def predict_logreg(inX, weights):
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Returns:
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- int: 预测的分类标签。
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"""
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z = np.dot(inX, weights)
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h = sigmoid(z)
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return 1 if h > 0.5 else 0
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# 这里也写自己的代码实现
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def load_data(filepath):
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@@ -65,7 +76,16 @@ def load_data(filepath):
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- np.array: 特征数据。
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- np.array: 标签数据。
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"""
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data = []
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labels = []
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with open(filepath, 'r') as f:
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lines = f.readlines()
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for line in lines:
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line = line.strip().split()
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line_data = [1] + [float(i) for i in line[:-1]]
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data.append(line_data)
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labels.append(int(line[-1]))
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return np.array(data), np.array(labels)
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if __name__ == "__main__":
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# 以下代码可用于测试,可自行随意修改
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