主成分分析(Principal Component Analysis,PCA), 将多个变量通过线性变换以选出较少个数重要变量的一种多
    
   
    
     元统计分析方法.
    
   
    
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     理论和数据见附录
    
   
    
     Spark 源码(mllib包)
     
    
   
    
     实验
    
   
    
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     Spark 源码(mllib包)
    
   
/** * A feature transformer that projects vectors to a low-dimensional space using PCA. * * @param k number of principal components */ @Since("1.4.0") class PCA @Since("1.4.0") (@Since("1.4.0") val k: Int) { require(k > 0, s"Number of principal components must be positive but got ${k}") /** * Computes a [[PCAModel]] that contains the principal components of the input vectors. * * @param sources source vectors
 
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