25 lines
544 B
Python
25 lines
544 B
Python
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"""Normalize features"""
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import numpy as np
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def normalize(features):
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features_normalized = np.copy(features).astype(float)
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# 计算均值
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features_mean = np.mean(features, 0)
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# 计算标准差
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features_deviation = np.std(features, 0)
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# 标准化操作
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if features.shape[0] > 1:
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features_normalized -= features_mean
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# 防止除以0
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features_deviation[features_deviation == 0] = 1
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features_normalized /= features_deviation
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return features_normalized, features_mean, features_deviation
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