20 lines
480 B
Python
20 lines
480 B
Python
import numpy as np
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import matplotlib.pyplot as plt
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from sklearn.decomposition import PCA
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from sklearn.datasets import load_iris
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# 加载数据
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iris = load_iris()
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x = iris.data
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# 执行 PCA
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pca = PCA(n_components=2)
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x_reduced = pca.fit_transform(x)
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# 绘制结果
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plt.figure(figsize=(10, 5))
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plt.scatter(x_reduced[:, 0], x_reduced[:, 1], c=iris.target)
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plt.xlabel('First Principal Component')
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plt.ylabel('Second Principal Component')
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plt.title('PCA of Iris Dataset')
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plt.show() |