[KongchangAI]
Unverified50% confidenceFactExact time

PCA等价于对数据协方差矩阵进行特征值分解,若对中心化数据矩阵X进行SVD得到X=UΣVᵀ,则右奇异向量V就是PCA的主成分方向,奇异值的平方除以样本数就是各主成分对应的方差

1
Sources
50%
Confidence
Long-term
Relevance
8/28/2026
First Seen

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Stable URI
https://kongchang.com/claim/813386
API
curl https://kongchang.com/api/v1/knowledge/claims/813386
MCP
get_claim(id=813386)