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http://funyakofunyao.click/2019/05/06/r%e3%81%a7%e4%b8%bb%e6%88%90%e5%88%86%e5%88%86%e6%9e%90%e3%81%99%e3%82%8b%e5%9f%ba%e6%9c%ac/
Rで主成分分析する基本