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center;\">\n<p style=\"text-indent: 0em;line-height: 1.75em;\"><span style=\"letter-spacing: 0.5px;\"><strong><span style=\"font-size: 15px;\">\u751f\u4fe1\u4ebaR\u8bed\u8a00\u5b66\u4e60\u5fc5\u5907<\/span><\/strong><\/span><\/p>\n<p style=\"text-indent: 0em;line-height: 1.75em;\"><span style=\"letter-spacing: 0.5px;\"><strong><span style=\"font-size: 15px;\">\u7acb\u523b\u62e5\u6709\u4e00\u4e2aRstudio\u8d26\u53f7<\/span><\/strong><\/span><\/p>\n<p style=\"text-indent: 0em;line-height: 1.75em;\"><span style=\"letter-spacing: 0.5px;\"><strong><span style=\"font-size: 15px;\">\u5f00\u542f\u5347\u7ea7\u6a21\u5f0f\u5427<\/span><\/strong><\/span><\/p>\n<p style=\"text-indent: 0em;line-height: 1.75em;\"><span style=\"color: rgb(255, 129, 36);font-size: 12px;letter-spacing: 0.5px;\">\uff0856\u7ebf\u7a0b\uff0c256G\u5185\u5b58\uff0c\u4e2a\u4eba\u5b58\u50a81T\uff09<\/span><\/p>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"display: inline-block;vertical-align: top;width: 29.9652%;align-self: flex-start;flex: 0 0 auto;height: auto;max-width: 29.9652% !important;\">\n<section style=\"margin-top: 10px;margin-bottom: 10px;\" powered-by=\"xiumi.us\">\n<section style=\"text-align: center;line-height: 0;\">\n<section>\n<section style=\"display: inline-block;vertical-align: middle;\" powered-by=\"xiumi.us\">\n<section style=\"line-height: 0;\">\n<section style=\"width: 111px;\" powered-by=\"xiumi.us\">\n<section style=\"line-height: 1.75em;text-indent: 0em;\">\n<section style=\"vertical-align: middle;display: inline-block;line-height: 0;height: auto;width: 111px;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"1\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/1_GBhsibRAgNiaQsH4ichdP9ibEhHMFA-104.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/sz_mmbiz_png\/zcicibWZessAyL6u7wJswOp8vtpzGp6vYngnlT6jiavu08Bvp2iblzGf3IkoBD9NGBhsibRAgNiaQsH4ichdP9ibEhHMFA\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"400\" style=\"vertical-align: middle;width: 100%;\" data-recalc-dims=\"1\" \/><\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<p style=\"text-indent: 0em;line-height: 1.75em;\"><br \/><\/p>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<section data-role=\"list\" style=\"\">\n<section style=\"\">\n<section powered-by=\"xiumi.us\" style=\"font-size: 16px;margin-top: 10px;margin-bottom: 8px;text-align: left;justify-content: flex-start;display: flex;flex-flow: row nowrap;\">\n<section style=\"padding-left: 8px;display: inline-block;width: 578px;vertical-align: top;border-left: 3px solid rgb(219, 219, 219);border-bottom-left-radius: 0px;align-self: flex-start;flex: 0 0 auto;\">\n<section powered-by=\"xiumi.us\" style=\"color: rgba(0, 0, 0, 0.5);text-align: justify;\">\n<p><span style=\"font-size: 14px;\">\u4fe1\u606f\u8fc7\u5ea6\u590d\u6742\u662f\u591a\u53d8\u91cf\u6570\u636e\u6700\u5927\u7684\u6311\u6218\u4e4b\u4e00\u3002\u8bb8\u591a\u5c0f\u4f19\u4f34\u7ecf\u5e38\u4f1a\u9047\u5230\u8fd9\u79cd\u95ee\u9898\uff0c\u4e8e\u662f\u6211\u4eec\u4f1a\u8003\u8651\u7528\u964d\u7ef4\u6765\u89e3\u51b3\uff0c\u8fd9\u65f6\u5019\u5f88\u591a\u4eba\u90fd\u4f1a\u60f3\u5230PCA\u964d\u7ef4\uff0c\u90a3\u4e48PCA\u5230\u5e95\u662f\u4ec0\u4e48\u5462\uff1f\u4eca\u5929\u5c0f\u679c\u6765\u5e26\u5927\u5bb6\u63a2\u7d22PCA\u7b97\u6cd5\u7684\u539f\u7406\u3002<\/span><\/p>\n<\/section>\n<\/section>\n<\/section>\n<section powered-by=\"xiumi.us\" style=\"\">\n<section style=\"\">\n<section powered-by=\"xiumi.us\" style=\"\">\n<section style=\"\">\n<section powered-by=\"xiumi.us\" style=\"\">\n<section style=\"\">\n<section powered-by=\"xiumi.us\" style=\"\">\n<p><br \/><\/p>\n<p><span style=\"font-size: 14px;font-family: \u5fae\u8f6f\u96c5\u9ed1;\">PCA\uff08Principal Component Analysis\uff09\u5168\u79f0\u4e3a\u4e3b\u6210\u5206\u5206\u6790\uff0c\u662f\u4e00\u79cd\u65e0\u76d1\u7763\u7684\u6570\u636e\u964d\u7ef4\u65b9\u6cd5\uff0c\u901a\u8fc7\u4e3b\u6210\u5206\u5206\u6790\u53ef\u4ee5\u5c3d\u53ef\u80fd\u4fdd\u7559\u4e0b\u5177\u5907\u533a\u5206\u6027\u7684\u4f4e\u7ef4\u6570\u636e\u7279\u5f81\u3002\u4e3b\u6210\u5206\u5206\u6790\u56fe\u80fd\u5e2e\u52a9\u6211\u4eec\u76f4\u89c2\u5730\u611f\u53d7\u6837\u672c\u5728\u964d\u7ef4\u540e\u7a7a\u95f4\u4e2d\u7684\u5206\u7c07\u548c\u805a\u5408\u60c5\u51b5\uff0c\u8fd9\u5728\u4e00\u5b9a\u7a0b\u5ea6\u4e0a\u4ea6\u80fd\u4f53\u73b0\u6837\u672c\u5728\u539f\u59cb\u7a7a\u95f4\u4e2d\u7684\u5206\u5e03\u60c5\u51b5\u3002<o:p><\/o:p><\/span><\/p>\n<p><span style=\"font-size: 14px;font-family: \u5fae\u8f6f\u96c5\u9ed1;\"><br \/><\/span><\/p>\n<p><span style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1;font-size: 14px;\">\u76f8\u4fe1\u5927\u5bb6\u770b\u5230\u8fd9\u91cc\u5e94\u8be5\u5927\u81f4\u80fd\u77e5\u9053PCA\u7a76\u7adf\u80fd\u5e72\u561b\u4e86\uff0c\u90a3\u4e48\u8be5\u600e\u4e48\u5b9e\u73b0\u5462\uff1f\u522b\u7740\u6025\uff0c\u5c0f\u679c\u4e0b\u9762\u901a\u8fc7\u4e00\u4e2a\u5206\u6790\u8fc7\u7a0b\u6765\u5e26\u5927\u5bb6\u5b66\u4e60\u5177\u4f53\u6d41\u7a0b\u3002<\/span><\/p>\n<p style=\"font-size: 16px;\"><span style=\"font-size: 14px;\"><br \/><\/span><\/p>\n<section style=\"\">\n<section data-id=\"22363\" powered-by=\"xmyeditor.com\" data-type=\"lspecial02\" data-md5=\"7ab9d\" style=\"font-size: 16px;\">\n<section style=\"text-align: left;\" powered-by=\"xmyeditor.com\" data-md5=\"7ab9d\">\n<section style=\"display: inline-block;vertical-align: middle;border-top: 1px dotted rgb(61, 170, 214);border-bottom: 1px dotted rgb(61, 170, 214);padding-right: 10px;padding-left: 10px;\" powered-by=\"xmyeditor.com\" data-md5=\"7ab9d\">\n<section style=\"color: rgb(61, 170, 214);letter-spacing: 1px;line-height: 24px;text-align: justify;\" powered-by=\"xmyeditor.com\" data-md5=\"7ab9d\">\n<p><strong><span style=\"color: rgb(0, 122, 170);\">1\u3001\u8f7d\u5165\u6570\u636e\u53ca\u76f8\u5173R\u5305<\/span><\/strong><strong style=\"color: rgb(0, 122, 170);\"><\/strong><\/p>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"\">\n<section style=\"margin-bottom: 0px;padding-right: 15px;padding-left: 15px;outline: 0px;font-size: 14px;visibility: visible;\">\n<section style=\"padding-right: 15px;padding-left: 15px;outline: 0px;visibility: visible;\">\n<section class=\"code-snippet__fix code-snippet__js\">\n<ul class=\"code-snippet__line-index code-snippet__js\">\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"cs\"><code><span class=\"code-snippet_outer\">library(ggplot2)<\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__meta\">#\u6570\u636e\u51c6\u5907<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">data <- subset(iris, <span class=\"code-snippet__keyword\">select<\/span> = -Species)<\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__keyword\">class<\/span> = iris[[<span class=\"code-snippet__string\">\"Species\"<\/span>]]<\/span><\/code><\/pre>\n<\/section>\n<\/section>\n<\/section>\n<p style=\"font-size: 16px;\"><span style=\"font-size: 14px;\"><br \/><\/span><\/p>\n<section style=\"font-size: 16px;margin-bottom: 0px;\">\n<section data-id=\"22363\" powered-by=\"xmyeditor.com\" data-type=\"lspecial02\" data-md5=\"7ab9d\">\n<section powered-by=\"xmyeditor.com\" data-md5=\"7ab9d\" style=\"text-align: left;\">\n<section powered-by=\"xmyeditor.com\" data-md5=\"7ab9d\" style=\"padding-right: 10px;padding-left: 10px;display: inline-block;vertical-align: middle;border-top: 1px dotted rgb(61, 170, 214);border-bottom: 1px dotted rgb(61, 170, 214);\">\n<section powered-by=\"xmyeditor.com\" data-md5=\"7ab9d\" style=\"color: rgb(61, 170, 214);letter-spacing: 1px;line-height: 24px;text-align: justify;\">\n<p><span style=\"color: rgb(0, 122, 170);\"><strong><span style=\"font-size: 15px;\">2.PCA\u5206\u6790<\/span><\/strong><\/span><\/p>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"margin-bottom: 0px;padding-right: 15px;padding-left: 15px;outline: 0px;font-size: 14px;visibility: visible;\">\n<section style=\"padding-right: 15px;padding-left: 15px;outline: 0px;visibility: visible;\">\n<section class=\"code-snippet__fix code-snippet__js\">\n<ul class=\"code-snippet__line-index code-snippet__js\">\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"nginx\"><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\">#\u8fdb\u884c\u4e3b\u6210\u5206\u5206\u6790<\/span><\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__attribute\">pca<\/span> = prcomp(data, center = T, scale. = T)<\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\">#\u4fdd\u5b58\u5404\u4e2a\u6837\u672c\u4e3b\u6210\u5206\u7684\u6570\u636e<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">pca.data = data.frame(pca<span class=\"code-snippet__variable\">$x<\/span>)<\/span><\/code><code><span class=\"code-snippet_outer\">pca.variance = pca<span class=\"code-snippet__variable\">$sdev<\/span>^<span class=\"code-snippet__number\">2<\/span> \/ sum(pca<span class=\"code-snippet__variable\">$sdev<\/span>^<span class=\"code-snippet__number\">2<\/span>)<\/span><\/code><\/pre>\n<\/section>\n<\/section>\n<\/section>\n<p style=\"margin-bottom: 0px;outline: 0px;visibility: visible;\"><br \/><\/p>\n<section data-id=\"22363\" powered-by=\"xmyeditor.com\" data-type=\"lspecial02\" data-md5=\"7ab9d\" style=\"margin-bottom: 0px;\">\n<section powered-by=\"xmyeditor.com\" data-md5=\"7ab9d\" style=\"text-align: left;\">\n<section powered-by=\"xmyeditor.com\" data-md5=\"7ab9d\" style=\"padding-right: 10px;padding-left: 10px;display: inline-block;vertical-align: middle;border-top: 1px dotted rgb(61, 170, 214);border-bottom: 1px dotted rgb(61, 170, 214);\">\n<section powered-by=\"xmyeditor.com\" data-md5=\"7ab9d\" style=\"letter-spacing: 1px;line-height: 24px;text-align: justify;\">\n<p><span style=\"font-size: 15px;\"><strong><span style=\"color: rgb(0, 122, 170);\">3.\u4e3b\u6210\u5206\u9009\u53d6<\/span><\/strong><\/span><\/p>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"margin-bottom: 0px;padding-right: 15px;padding-left: 15px;outline: 0px;font-size: 14px;visibility: visible;\">\n<section style=\"padding-right: 15px;padding-left: 15px;outline: 0px;visibility: visible;\">\n<section class=\"code-snippet__fix code-snippet__js\">\n<ul class=\"code-snippet__line-index code-snippet__js\">\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"apache\"><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\">#\u67e5\u770b\u4e3b\u6210\u5206\u5206\u6790\u7684\u8be6\u7ec6\u60c5\u51b5<\/span><\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__attribute\">summary<\/span>(pca)<\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\">#\u6267\u884c\u540e\u4f1a\u5f97\u5230\u5982\u4e0b\u7ed3\u679c<\/span><\/span><\/code><\/pre>\n<\/section>\n<\/section>\n<\/section>\n<p style=\"text-align: center;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-galleryid=\"\" data-ratio=\"0.21328671328671328\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/2_mIR3eAXEPfMjB15n9iaHSNEYNZ9FbQ.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/sz_mmbiz_png\/zcicibWZessAySluCsI4g499lVRLKEdY2sSPZaG44z5gAlnibHDENdC17YItmIR3eAXEPfMjB15n9iaHSNEYNZ9FbQ\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"572\" style=\"\" data-recalc-dims=\"1\" \/><\/p>\n<p><span style=\"text-decoration: underline;\"><strong><span style=\"text-decoration: underline;font-size: 15px;color: rgb(0, 122, 170);\">\u8bf4\u660e\uff1a<\/span><\/strong><\/span><span style=\"font-size: 14px;font-family: \u5fae\u8f6f\u96c5\u9ed1;\">\u7ed3\u679c\u4e2d\u7684PC1\u3001PC2\u3001PC3\u3001\u548cPC4\u662f\u8ba1\u7b97\u51fa\u6765\u7684\u4e3b\u6210\u5206\uff0c\u56fe\u4e2d\u7684Standard deviation\u4ee3\u8868\u6bcf\u4e2a\u4e3b\u6210\u5206\u7684\u6807\u51c6\u5dee\uff0cProportion of Variance\u4ee3\u8868\u6bcf\u4e2a\u4e3b\u6210\u5206\u7684\u8d21\u732e\u7387\uff0cCumulative Proportion\u4ee3\u8868\u5404\u4e2a\u4e3b\u6210\u5206\u7684\u7d2f\u79ef\u8d21\u732e\u7387\u3002\u6bcf\u4e2a\u4e3b\u6210\u5206\u90fd\u4e0d\u5c5e\u4e8eX1\u3001X2\u3001X3\u548cX4\u4e2d\u7684\u4efb\u4f55\u4e00\u4e2a\u3002\u7b2c\u4e00\u4e3b\u6210\u5206\u3001\u7b2c\u4e8c\u4e3b\u6210\u5206\u3001\u7b2c\u4e09\u4e3b\u6210\u5206\u548c\u7b2c\u56db\u4e3b\u6210\u5206\u90fd\u662fX1\u3001X2\u3001X3\u548cX4\u7684\u7ebf\u6027\u7ec4\u5408\uff0c\u4e5f\u5c31\u662f\u8bf4\u6700\u539f\u59cb\u6570\u636e\u7684\u6210\u5206\u7ecf\u8fc7\u7ebf\u6027\u53d8\u6362\u5f97\u5230\u4e86\u5404\u4e2a\u4e3b\u6210\u5206\u3002\u4e00\u822c\u5730\uff0c\u9009\u62e9\u7d2f\u79ef\u8d21\u732e\u7387\u8fbe\u5230\u516b\u6210\u7684\u524d\u51e0\u4e2a\u4e3b\u6210\u5206\u5373\u53ef\uff08\u8fd9\u4e2a\u5b9e\u4f8b\u4e2d\u6211\u4eec\u9009\u62e9\u524d\u4e24\u4e2a\uff0c\u6bd5\u7adf\u7b2c\u4e8c\u4e3b\u6210\u5206\u7684\u8d21\u732e\u7387\u4e5f\u6bd4\u8f83\u5927\uff09\u3002<\/span><span style=\"mso-spacerun:'yes';font-family:\u5fae\u8f6f\u96c5\u9ed1;font-size:16.0000pt;mso-font-kerning:1.0000pt;\"><o:p><\/o:p><\/span><\/p>\n<p style=\"margin-bottom: 0px;outline: 0px;visibility: visible;\"><br \/><\/p>\n<section data-id=\"22363\" powered-by=\"xmyeditor.com\" data-type=\"lspecial02\" data-md5=\"7ab9d\" style=\"margin-bottom: 0px;\">\n<section powered-by=\"xmyeditor.com\" data-md5=\"7ab9d\" style=\"text-align: left;\">\n<section powered-by=\"xmyeditor.com\" data-md5=\"7ab9d\" style=\"padding-right: 10px;padding-left: 10px;display: inline-block;vertical-align: middle;border-top: 1px dotted rgb(61, 170, 214);border-bottom: 1px dotted rgb(61, 170, 214);\">\n<section powered-by=\"xmyeditor.com\" data-md5=\"7ab9d\" style=\"letter-spacing: 1px;line-height: 24px;text-align: justify;\">\n<p style=\"font-size: 15px;\"><span style=\"color: rgb(0, 122, 170);\"><strong>4.PCA\u53ef\u89c6\u5316<\/strong><\/span><\/p>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"font-size: 16px;\">\n<section style=\"margin-bottom: 0px;padding-right: 15px;padding-left: 15px;outline: 0px;font-size: 14px;visibility: visible;\">\n<section style=\"padding-right: 15px;padding-left: 15px;outline: 0px;visibility: visible;\">\n<section class=\"code-snippet__fix code-snippet__js\">\n<ul class=\"code-snippet__line-index code-snippet__js\">\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"makefile\"><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\">#\u81ea\u5b9a\u4e49\u989c\u8272<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">palette = c(<span class=\"code-snippet__string\">\"mediumseagreen\"<\/span>, <span class=\"code-snippet__string\">\"darkorange\"<\/span>, <span class=\"code-snippet__string\">\"royalblue\"<\/span>)<\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\">#\u7ed8\u5236PCA\u9009\u53d6\u7279\u5f81\u4e0b\u6837\u672c\u6563\u70b9\u56fe<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">ggplot(pca.data, aes(x = PC1, y = PC2, color = class)) +<\/span><\/code><code><span class=\"code-snippet_outer\"> geom_point(size = 3) +<\/span><\/code><code><span class=\"code-snippet_outer\"> geom_hline(yintercept = 0) + <\/span><\/code><code><span class=\"code-snippet_outer\"> geom_vline(xintercept = 0) +<\/span><\/code><code><span class=\"code-snippet_outer\"> stat_ellipse(aes(x = PC1, y = PC2), linetype = 2, size = 0.5, level = 0.95, inherit.aes = FALSE) + <\/span><\/code><code><span class=\"code-snippet_outer\"> theme_bw() +<\/span><\/code><code><span class=\"code-snippet_outer\"> scale_color_manual(values = palette) +<\/span><\/code><code><span class=\"code-snippet_outer\"> theme(panel.grid.major.x = element_blank(),<\/span><\/code><code><span class=\"code-snippet_outer\"> panel.grid.minor.x = element_blank(),<\/span><\/code><code><span class=\"code-snippet_outer\"> panel.grid.major.y = element_blank(),<\/span><\/code><code><span class=\"code-snippet_outer\"> panel.grid.minor.y = element_blank()) +<\/span><\/code><code><span class=\"code-snippet_outer\"> labs(x = paste0(<span class=\"code-snippet__string\">\"PC1: \"<\/span>, signif(pca.variance[1] * 100, 3), <span class=\"code-snippet__string\">\"%\"<\/span>), y = paste0(<span class=\"code-snippet__string\">\"PC2: \"<\/span>, signif(pca.variance[2] * 100, 3), <span class=\"code-snippet__string\">\"%\"<\/span>), title=paste0(<span class=\"code-snippet__string\">\"PCA of iris\"<\/span>))+theme(plot.title = element_text(hjust = 0.5))<\/span><\/code><\/pre>\n<\/section>\n<\/section>\n<\/section>\n<p style=\"margin-bottom: 0px;outline: 0px;visibility: visible;\"><br \/><\/p>\n<section data-role=\"title\" data-tools=\"135\u7f16\u8f91\u5668\" data-id=\"104726\">\n<section style=\"text-align: center;margin: 10px auto;\">\n<section style=\"display: inline-block;\">\n<section style=\"background-color: rgb(84, 141, 212);padding: 7px 10px;\">\n<section style=\"display: flex;justify-content: center;align-items: center;\">\n<section style=\"width: 8px;height: 8px;background-color: rgb(255, 255, 255);border-radius: 50%;overflow: hidden;\"><br \/><\/section>\n<section data-brushtype=\"text\" style=\"font-size: 16px;letter-spacing: 1.5px;color: rgb(255, 255, 255);margin-right: 10px;margin-left: 10px;\"><strong>\u7ed3\u679c\u5c55\u793a<\/strong><\/section>\n<section style=\"width: 8px;height: 8px;background-color: rgb(255, 255, 255);border-radius: 50%;\"><br \/><\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<section data-role=\"paragraph\">\n<p><br \/><\/p>\n<p><span style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1;font-size: 14px;\">\u5206\u6790\u6700\u540e\u6211\u4eec\u4f1a\u5f97\u5230\u4e00\u4e2aPCA\u5206\u6790\u56fe\uff0c\u5982\u4e0b\u56fe1\u6240\u793a\uff0c\u56fe\u4e2d\u7684\u6a2a\u7eb5\u5750\u6807\u5206\u522b\u5bf9\u5e94\u4e3b\u6210\u5206PC1\u548cPC2\uff0c\u6574\u4f53\u8868\u73b0\u4e86\u6240\u6709\u6837\u672c\u5728\u8fd9\u4e24\u4e2a\u4e3b\u6210\u5206\u4e0a\u7684\u5206\u5e03\u3002\u540c\u65f6\u5c0f\u4f19\u4f34\u4eec\u8fd8\u53ef\u4ee5\u4fdd\u5b58\u6837\u672c\u5728\u4e3b\u6210\u5206\u4e0a\u7684\u8868\u8fbe\u6c34\u5e73\u6765\u5f00\u5c55\u5176\u4ed6\u5206\u6790\uff0c\u5177\u4f53\u6837\u4f8b\u5982\u56fe2\u6240\u793a\uff0c\u6bcf\u884c\u4e3a\u4e00\u4e2a\u6837\u672c\uff0c\u5217\u4e3a\u4e0d\u540c\u7684\u4e3b\u6210\u5206\u3002<\/span><span style=\"mso-spacerun:'yes';font-family:\u5fae\u8f6f\u96c5\u9ed1;font-size:16.0000pt;mso-font-kerning:1.0000pt;\"><o:p><\/o:p><\/span><\/p>\n<p style=\"text-align: center;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-galleryid=\"\" data-ratio=\"0.47186147186147187\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/3_aibkIgnHAoM5SeNm4EDibXrL31x1PQ.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/sz_mmbiz_png\/zcicibWZessAySluCsI4g499lVRLKEdY2sGoRTac7vmRT0Y3soVJbXZjrNMicaibkIgnHAoM5SeNm4EDibXrL31x1PQ\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"693\" style=\"\" data-recalc-dims=\"1\"><\/p>\n<\/section>\n<p style=\"text-align: center;\"><span style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1;color: rgb(136, 136, 136);font-size: 12px;\">\u56fe1 \u4e3b\u6210\u5206\u5206\u6790\u56fe<\/span><\/p>\n<p style=\"text-align: center;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-galleryid=\"\" data-ratio=\"0.3225152129817444\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/4_SZ1Hq0HqI0W9D6keth44seeEYSx01g.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/sz_mmbiz_png\/zcicibWZessAySluCsI4g499lVRLKEdY2sDWjCZfftZTcCo0sPleiaAd7YBSZ1Hq0HqI0W9D6keth44seeEYSx01g\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"493\" style=\"\" data-recalc-dims=\"1\" \/><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1;font-size: 12px;color: rgb(136, 136, 136);\">\u56fe2 \u6837\u672c\u4e3b\u6210\u5206\u8868\u8fbe\u77e9\u9635\u6837\u4f8b<\/span><span style=\"mso-spacerun:'yes';font-family:\u5fae\u8f6f\u96c5\u9ed1;font-size:16.0000pt;mso-font-kerning:1.0000pt;\"><o:p><\/o:p><\/span><\/p>\n<p><span style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1;font-size: 14px;\">\u5927\u529f\u544a\u6210\uff01\u5206\u6790\u5230\u8fd9\u91cc\u5c31\u7ed3\u675f\u4e86\uff0c\u76f8\u4fe1\u5927\u5bb6\u5df2\u7ecf\u638c\u63e1\u4e86\uff0c\u611f\u5174\u8da3\u7684\u5c0f\u4f19\u4f34\u5feb\u53bb\u8bd5\u8bd5\u5427\uff01<\/span><\/p>\n<p style=\"text-align: center;\"><br \/><\/p>\n<p><span style=\"font-size: 14px;color: rgb(0, 122, 170);\">\u8fd9\u91cc\u63a8\u8350\u4e00\u4e0b\u5c0f\u679c\u65b0\u5f00\u53d1\u7684\u96f6\u4ee3\u7801\u4e91\u751f\u4fe1\u5206\u6790\u5de5\u5177\u5e73\u53f0\u5305\u542b\u8d85\u591a\u96f6\u4ee3\u7801\u5c0f\u5de5\u5177\uff0c\u4e0a\u4f20\u6570\u636e\u4e00\u952e\u51fa\u56fe\uff0c\u611f\u5174\u8da3\u7684\u5c0f\u4f19\u4f34\u6b22\u8fce\u4e86\u89e3~<\/span><\/p>\n<p><span style=\"font-size: 14px;color: rgb(0, 122, 170);\">\u7f51\u5740\uff1ahttp:\/\/www.biocloudservice.com\/home.html<\/span><span style=\"text-align: center;letter-spacing: 0.578px;\"><\/span><span style=\"color: rgb(0, 122, 170);font-size: 14px;letter-spacing: 0.578px;\"><\/span><\/p>\n<p><br \/><\/p>\n<section data-id=\"75061\" data-type=\"lspecial02\" data-tools=\"\u901f\u6392\u5c0f\u8682\u8681\u7f16\u8f91\u5668\" powered-by=\"xmyeditor.com\" data-md5=\"83a15\">\n<p><span style=\"font-size: 14px;\">\u4eca\u5929\u5c0f\u679c\u7684\u5206\u4eab\u5c31\u5230\u8fd9\u91cc\uff0c\u6b22\u8fce\u5927\u5bb6\u548c\u5c0f\u679c\u4e00\u8d77\u8ba8\u8bba\u5b66\u4e60\uff0c\u4e0b\u671f\u518d\u89c1\u54e6\uff01<\/span><\/p>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"outline: 0px;visibility: visible;\">\n<section data-role=\"list\" style=\"outline: 0px;visibility: visible;\">\n<section style=\"outline: 0px;visibility: visible;\">\n<section powered-by=\"xiumi.us\" style=\"outline: 0px;visibility: visible;\">\n<section style=\"outline: 0px;visibility: visible;\">\n<section style=\"padding-right: 15px;padding-left: 15px;outline: 0px;font-size: 14px;\">\n<section powered-by=\"xiumi.us\" style=\"outline: 0px;height: auto;transform: perspective(0px);transform-style: flat;\">\n<section style=\"margin-top: 10px;margin-bottom: -3px;outline: 0px;text-align: left;justify-content: flex-start;display: flex;flex-flow: row nowrap;transform: translate3d(19px, 0px, 0px) rotateX(180deg);\">\n<section 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data={\"mp\":\"\u751f\u4fe1\u679c\",\"title\":\"\u6570\u636e\u964d\u7ef4\uff0c\u4e0d\u5f97\u4e0d\u8bf4\u7684\u7ecf\u5178\u673a\u5668\u5b66\u4e60\u65b9\u6cd5\u2014\u2014PCA\",\"time\":\"2023-07-31 19:00:14\",\"timeStamp\":\"1690801214\"};\n<\/script><br \/>\n<body><\/p>\n<div class=\"rich_media\">\n<h1 class=\"rich_media_title\" id=\"activity-name\"><a href=\"http:\/\/mp.weixin.qq.com\/s?__biz=Mzg3OTg3MjQyNg==&mid=2247490679&idx=1&sn=a7a78cc672a7046ae021040a4665560a&chksm=cf7c8cb2f80b05a484484d04e2091b5ad233a5fe2364932f29a4f31d39bc4e19e94e4f8dd826#rd\" target=\"_blank\" rel=\"noopener\">\u6570\u636e\u964d\u7ef4\uff0c\u4e0d\u5f97\u4e0d\u8bf4\u7684\u7ecf\u5178\u673a\u5668\u5b66\u4e60\u65b9\u6cd5\u2014\u2014PCA<\/a><\/h1>\n<div id=\"meta_content\" class=\"rich_media_meta_list\"><span id=\"copyright_logo\" class=\"wx_tap_link js_wx_tap_highlight rich_media_meta icon_appmsg_tag appmsg_title_tag weui-wa-hotarea\">\u539f\u521b <\/span><span class=\"rich_media_meta rich_media_meta_text\">\u5c0f\u679c <\/span><span class=\"rich_media_meta rich_media_meta_nickname\" id=\"profileBt\"><a href=\"javascript:void(0);\" class=\"wx_tap_link js_wx_tap_highlight weui-wa-hotarea\" id=\"js_name\">\u751f\u4fe1\u679c <\/a><\/span><em id=\"publish_time\" class=\"rich_media_meta rich_media_meta_text\">2023-07-31 19:00:14<\/em><\/div>\n<p><content><\/p>\n<section style=\"margin-bottom: 0px;letter-spacing: 0.578px;white-space: normal;\" data-mpa-powered-by=\"yiban.io\">\n<section style=\"\">\n<section style=\"\">\n<section style=\"\">\n<section style=\"\">\n<section style=\"\">\n<section data-width=\"100%\" style=\"font-size: 16px;width: 578px;flex: 0 0 100%;opacity: 1;\">\n<section style=\"line-height: 1.8;\">\n<section>\n<section>\n<section style=\"margin-top: 10px;margin-bottom: 20px;display: flex;flex-flow: row nowrap;text-align: center;justify-content: center;\">\n<section style=\"display: inline-block;width: 578px;vertical-align: top;border-style: 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center;\">\n<p style=\"text-indent: 0em;line-height: 1.75em;\"><span style=\"letter-spacing: 0.5px;\"><strong><span style=\"font-size: 15px;\">\u751f\u4fe1\u4ebaR\u8bed\u8a00\u5b66\u4e60\u5fc5\u5907<\/span><\/strong><\/span><\/p>\n<p style=\"text-indent: 0em;line-height: 1.75em;\"><span style=\"letter-spacing: 0.5px;\"><strong><span style=\"font-size: 15px;\">\u7acb\u523b\u62e5\u6709\u4e00\u4e2aRstudio\u8d26\u53f7<\/span><\/strong><\/span><\/p>\n<p style=\"text-indent: 0em;line-height: 1.75em;\"><span style=\"letter-spacing: 0.5px;\"><strong><span style=\"font-size: 15px;\">\u5f00\u542f\u5347\u7ea7\u6a21\u5f0f\u5427<\/span><\/strong><\/span><\/p>\n<p style=\"text-indent: 0em;line-height: 1.75em;\"><span style=\"color: rgb(255, 129, 36);font-size: 12px;letter-spacing: 0.5px;\">\uff0856\u7ebf\u7a0b\uff0c256G\u5185\u5b58\uff0c\u4e2a\u4eba\u5b58\u50a81T\uff09<\/span><\/p>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"display: inline-block;vertical-align: top;width: 29.9652%;align-self: flex-start;flex: 0 0 auto;height: auto;max-width: 29.9652% !important;\">\n<section style=\"margin-top: 10px;margin-bottom: 10px;\" powered-by=\"xiumi.us\">\n<section style=\"text-align: center;line-height: 0;\">\n<section>\n<section style=\"display: inline-block;vertical-align: middle;\" powered-by=\"xiumi.us\">\n<section style=\"line-height: 0;\">\n<section style=\"width: 111px;\" powered-by=\"xiumi.us\">\n<section style=\"line-height: 1.75em;text-indent: 0em;\">\n<section style=\"vertical-align: middle;display: inline-block;line-height: 0;height: auto;width: 111px;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"1\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/1_GBhsibRAgNiaQsH4ichdP9ibEhHMFA-104.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/sz_mmbiz_png\/zcicibWZessAyL6u7wJswOp8vtpzGp6vYngnlT6jiavu08Bvp2iblzGf3IkoBD9NGBhsibRAgNiaQsH4ichdP9ibEhHMFA\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"400\" style=\"vertical-align: middle;width: 100%;\" data-recalc-dims=\"1\" \/><\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<p style=\"text-indent: 0em;line-height: 1.75em;\"><br \/><\/p>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<section data-role=\"list\" style=\"\">\n<section style=\"\">\n<section powered-by=\"xiumi.us\" style=\"font-size: 16px;margin-top: 10px;margin-bottom: 8px;text-align: left;justify-content: flex-start;display: flex;flex-flow: row nowrap;\">\n<section style=\"padding-left: 8px;display: inline-block;width: 578px;vertical-align: top;border-left: 3px solid rgb(219, 219, 219);border-bottom-left-radius: 0px;align-self: flex-start;flex: 0 0 auto;\">\n<section powered-by=\"xiumi.us\" style=\"color: rgba(0, 0, 0, 0.5);text-align: justify;\">\n<p><span style=\"font-size: 14px;\">\u4fe1\u606f\u8fc7\u5ea6\u590d\u6742\u662f\u591a\u53d8\u91cf\u6570\u636e\u6700\u5927\u7684\u6311\u6218\u4e4b\u4e00\u3002\u8bb8\u591a\u5c0f\u4f19\u4f34\u7ecf\u5e38\u4f1a\u9047\u5230\u8fd9\u79cd\u95ee\u9898\uff0c\u4e8e\u662f\u6211\u4eec\u4f1a\u8003\u8651\u7528\u964d\u7ef4\u6765\u89e3\u51b3\uff0c\u8fd9\u65f6\u5019\u5f88\u591a\u4eba\u90fd\u4f1a\u60f3\u5230PCA\u964d\u7ef4\uff0c\u90a3\u4e48PCA\u5230\u5e95\u662f\u4ec0\u4e48\u5462\uff1f\u4eca\u5929\u5c0f\u679c\u6765\u5e26\u5927\u5bb6\u63a2\u7d22PCA\u7b97\u6cd5\u7684\u539f\u7406\u3002<\/span><\/p>\n<\/section>\n<\/section>\n<\/section>\n<section powered-by=\"xiumi.us\" style=\"\">\n<section style=\"\">\n<section powered-by=\"xiumi.us\" style=\"\">\n<section style=\"\">\n<section powered-by=\"xiumi.us\" style=\"\">\n<section style=\"\">\n<section powered-by=\"xiumi.us\" style=\"\">\n<p><br \/><\/p>\n<p><span style=\"font-size: 14px;font-family: \u5fae\u8f6f\u96c5\u9ed1;\">PCA\uff08Principal Component Analysis\uff09\u5168\u79f0\u4e3a\u4e3b\u6210\u5206\u5206\u6790\uff0c\u662f\u4e00\u79cd\u65e0\u76d1\u7763\u7684\u6570\u636e\u964d\u7ef4\u65b9\u6cd5\uff0c\u901a\u8fc7\u4e3b\u6210\u5206\u5206\u6790\u53ef\u4ee5\u5c3d\u53ef\u80fd\u4fdd\u7559\u4e0b\u5177\u5907\u533a\u5206\u6027\u7684\u4f4e\u7ef4\u6570\u636e\u7279\u5f81\u3002\u4e3b\u6210\u5206\u5206\u6790\u56fe\u80fd\u5e2e\u52a9\u6211\u4eec\u76f4\u89c2\u5730\u611f\u53d7\u6837\u672c\u5728\u964d\u7ef4\u540e\u7a7a\u95f4\u4e2d\u7684\u5206\u7c07\u548c\u805a\u5408\u60c5\u51b5\uff0c\u8fd9\u5728\u4e00\u5b9a\u7a0b\u5ea6\u4e0a\u4ea6\u80fd\u4f53\u73b0\u6837\u672c\u5728\u539f\u59cb\u7a7a\u95f4\u4e2d\u7684\u5206\u5e03\u60c5\u51b5\u3002<o:p><\/o:p><\/span><\/p>\n<p><span style=\"font-size: 14px;font-family: \u5fae\u8f6f\u96c5\u9ed1;\"><br \/><\/span><\/p>\n<p><span style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1;font-size: 14px;\">\u76f8\u4fe1\u5927\u5bb6\u770b\u5230\u8fd9\u91cc\u5e94\u8be5\u5927\u81f4\u80fd\u77e5\u9053PCA\u7a76\u7adf\u80fd\u5e72\u561b\u4e86\uff0c\u90a3\u4e48\u8be5\u600e\u4e48\u5b9e\u73b0\u5462\uff1f\u522b\u7740\u6025\uff0c\u5c0f\u679c\u4e0b\u9762\u901a\u8fc7\u4e00\u4e2a\u5206\u6790\u8fc7\u7a0b\u6765\u5e26\u5927\u5bb6\u5b66\u4e60\u5177\u4f53\u6d41\u7a0b\u3002<\/span><\/p>\n<p style=\"font-size: 16px;\"><span style=\"font-size: 14px;\"><br \/><\/span><\/p>\n<section style=\"\">\n<section data-id=\"22363\" powered-by=\"xmyeditor.com\" data-type=\"lspecial02\" data-md5=\"7ab9d\" style=\"font-size: 16px;\">\n<section style=\"text-align: left;\" powered-by=\"xmyeditor.com\" data-md5=\"7ab9d\">\n<section style=\"display: inline-block;vertical-align: middle;border-top: 1px dotted rgb(61, 170, 214);border-bottom: 1px dotted rgb(61, 170, 214);padding-right: 10px;padding-left: 10px;\" powered-by=\"xmyeditor.com\" data-md5=\"7ab9d\">\n<section style=\"color: rgb(61, 170, 214);letter-spacing: 1px;line-height: 24px;text-align: justify;\" powered-by=\"xmyeditor.com\" data-md5=\"7ab9d\">\n<p><strong><span style=\"color: rgb(0, 122, 170);\">1\u3001\u8f7d\u5165\u6570\u636e\u53ca\u76f8\u5173R\u5305<\/span><\/strong><strong style=\"color: rgb(0, 122, 170);\"><\/strong><\/p>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"\">\n<section style=\"margin-bottom: 0px;padding-right: 15px;padding-left: 15px;outline: 0px;font-size: 14px;visibility: visible;\">\n<section style=\"padding-right: 15px;padding-left: 15px;outline: 0px;visibility: visible;\">\n<section class=\"code-snippet__fix code-snippet__js\">\n<ul class=\"code-snippet__line-index code-snippet__js\">\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"cs\"><code><span class=\"code-snippet_outer\">library(ggplot2)<\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__meta\">#\u6570\u636e\u51c6\u5907<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">data <- subset(iris, <span class=\"code-snippet__keyword\">select<\/span> = -Species)<\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__keyword\">class<\/span> = iris[[<span class=\"code-snippet__string\">\"Species\"<\/span>]]<\/span><\/code><\/pre>\n<\/section>\n<\/section>\n<\/section>\n<p style=\"font-size: 16px;\"><span style=\"font-size: 14px;\"><br \/><\/span><\/p>\n<section style=\"font-size: 16px;margin-bottom: 0px;\">\n<section data-id=\"22363\" powered-by=\"xmyeditor.com\" data-type=\"lspecial02\" data-md5=\"7ab9d\">\n<section powered-by=\"xmyeditor.com\" data-md5=\"7ab9d\" style=\"text-align: left;\">\n<section powered-by=\"xmyeditor.com\" data-md5=\"7ab9d\" style=\"padding-right: 10px;padding-left: 10px;display: inline-block;vertical-align: middle;border-top: 1px dotted rgb(61, 170, 214);border-bottom: 1px dotted rgb(61, 170, 214);\">\n<section powered-by=\"xmyeditor.com\" data-md5=\"7ab9d\" style=\"color: rgb(61, 170, 214);letter-spacing: 1px;line-height: 24px;text-align: justify;\">\n<p><span style=\"color: rgb(0, 122, 170);\"><strong><span style=\"font-size: 15px;\">2.PCA\u5206\u6790<\/span><\/strong><\/span><\/p>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"margin-bottom: 0px;padding-right: 15px;padding-left: 15px;outline: 0px;font-size: 14px;visibility: visible;\">\n<section style=\"padding-right: 15px;padding-left: 15px;outline: 0px;visibility: visible;\">\n<section class=\"code-snippet__fix code-snippet__js\">\n<ul class=\"code-snippet__line-index code-snippet__js\">\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"nginx\"><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\">#\u8fdb\u884c\u4e3b\u6210\u5206\u5206\u6790<\/span><\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__attribute\">pca<\/span> = prcomp(data, center = T, scale. = T)<\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\">#\u4fdd\u5b58\u5404\u4e2a\u6837\u672c\u4e3b\u6210\u5206\u7684\u6570\u636e<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">pca.data = data.frame(pca<span class=\"code-snippet__variable\">$x<\/span>)<\/span><\/code><code><span class=\"code-snippet_outer\">pca.variance = pca<span class=\"code-snippet__variable\">$sdev<\/span>^<span class=\"code-snippet__number\">2<\/span> \/ sum(pca<span class=\"code-snippet__variable\">$sdev<\/span>^<span class=\"code-snippet__number\">2<\/span>)<\/span><\/code><\/pre>\n<\/section>\n<\/section>\n<\/section>\n<p style=\"margin-bottom: 0px;outline: 0px;visibility: visible;\"><br \/><\/p>\n<section data-id=\"22363\" powered-by=\"xmyeditor.com\" data-type=\"lspecial02\" data-md5=\"7ab9d\" style=\"margin-bottom: 0px;\">\n<section powered-by=\"xmyeditor.com\" data-md5=\"7ab9d\" style=\"text-align: left;\">\n<section powered-by=\"xmyeditor.com\" data-md5=\"7ab9d\" style=\"padding-right: 10px;padding-left: 10px;display: inline-block;vertical-align: middle;border-top: 1px dotted rgb(61, 170, 214);border-bottom: 1px dotted rgb(61, 170, 214);\">\n<section powered-by=\"xmyeditor.com\" data-md5=\"7ab9d\" style=\"letter-spacing: 1px;line-height: 24px;text-align: justify;\">\n<p><span style=\"font-size: 15px;\"><strong><span style=\"color: rgb(0, 122, 170);\">3.\u4e3b\u6210\u5206\u9009\u53d6<\/span><\/strong><\/span><\/p>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"margin-bottom: 0px;padding-right: 15px;padding-left: 15px;outline: 0px;font-size: 14px;visibility: visible;\">\n<section style=\"padding-right: 15px;padding-left: 15px;outline: 0px;visibility: visible;\">\n<section class=\"code-snippet__fix code-snippet__js\">\n<ul class=\"code-snippet__line-index code-snippet__js\">\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"apache\"><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\">#\u67e5\u770b\u4e3b\u6210\u5206\u5206\u6790\u7684\u8be6\u7ec6\u60c5\u51b5<\/span><\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__attribute\">summary<\/span>(pca)<\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\">#\u6267\u884c\u540e\u4f1a\u5f97\u5230\u5982\u4e0b\u7ed3\u679c<\/span><\/span><\/code><\/pre>\n<\/section>\n<\/section>\n<\/section>\n<p style=\"text-align: center;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-galleryid=\"\" data-ratio=\"0.21328671328671328\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/2_mIR3eAXEPfMjB15n9iaHSNEYNZ9FbQ.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/sz_mmbiz_png\/zcicibWZessAySluCsI4g499lVRLKEdY2sSPZaG44z5gAlnibHDENdC17YItmIR3eAXEPfMjB15n9iaHSNEYNZ9FbQ\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"572\" style=\"\" data-recalc-dims=\"1\" \/><\/p>\n<p><span style=\"text-decoration: underline;\"><strong><span style=\"text-decoration: underline;font-size: 15px;color: rgb(0, 122, 170);\">\u8bf4\u660e\uff1a<\/span><\/strong><\/span><span style=\"font-size: 14px;font-family: \u5fae\u8f6f\u96c5\u9ed1;\">\u7ed3\u679c\u4e2d\u7684PC1\u3001PC2\u3001PC3\u3001\u548cPC4\u662f\u8ba1\u7b97\u51fa\u6765\u7684\u4e3b\u6210\u5206\uff0c\u56fe\u4e2d\u7684Standard deviation\u4ee3\u8868\u6bcf\u4e2a\u4e3b\u6210\u5206\u7684\u6807\u51c6\u5dee\uff0cProportion of Variance\u4ee3\u8868\u6bcf\u4e2a\u4e3b\u6210\u5206\u7684\u8d21\u732e\u7387\uff0cCumulative Proportion\u4ee3\u8868\u5404\u4e2a\u4e3b\u6210\u5206\u7684\u7d2f\u79ef\u8d21\u732e\u7387\u3002\u6bcf\u4e2a\u4e3b\u6210\u5206\u90fd\u4e0d\u5c5e\u4e8eX1\u3001X2\u3001X3\u548cX4\u4e2d\u7684\u4efb\u4f55\u4e00\u4e2a\u3002\u7b2c\u4e00\u4e3b\u6210\u5206\u3001\u7b2c\u4e8c\u4e3b\u6210\u5206\u3001\u7b2c\u4e09\u4e3b\u6210\u5206\u548c\u7b2c\u56db\u4e3b\u6210\u5206\u90fd\u662fX1\u3001X2\u3001X3\u548cX4\u7684\u7ebf\u6027\u7ec4\u5408\uff0c\u4e5f\u5c31\u662f\u8bf4\u6700\u539f\u59cb\u6570\u636e\u7684\u6210\u5206\u7ecf\u8fc7\u7ebf\u6027\u53d8\u6362\u5f97\u5230\u4e86\u5404\u4e2a\u4e3b\u6210\u5206\u3002\u4e00\u822c\u5730\uff0c\u9009\u62e9\u7d2f\u79ef\u8d21\u732e\u7387\u8fbe\u5230\u516b\u6210\u7684\u524d\u51e0\u4e2a\u4e3b\u6210\u5206\u5373\u53ef\uff08\u8fd9\u4e2a\u5b9e\u4f8b\u4e2d\u6211\u4eec\u9009\u62e9\u524d\u4e24\u4e2a\uff0c\u6bd5\u7adf\u7b2c\u4e8c\u4e3b\u6210\u5206\u7684\u8d21\u732e\u7387\u4e5f\u6bd4\u8f83\u5927\uff09\u3002<\/span><span style=\"mso-spacerun:'yes';font-family:\u5fae\u8f6f\u96c5\u9ed1;font-size:16.0000pt;mso-font-kerning:1.0000pt;\"><o:p><\/o:p><\/span><\/p>\n<p style=\"margin-bottom: 0px;outline: 0px;visibility: visible;\"><br \/><\/p>\n<section data-id=\"22363\" powered-by=\"xmyeditor.com\" data-type=\"lspecial02\" data-md5=\"7ab9d\" style=\"margin-bottom: 0px;\">\n<section powered-by=\"xmyeditor.com\" data-md5=\"7ab9d\" style=\"text-align: left;\">\n<section powered-by=\"xmyeditor.com\" data-md5=\"7ab9d\" style=\"padding-right: 10px;padding-left: 10px;display: inline-block;vertical-align: middle;border-top: 1px dotted rgb(61, 170, 214);border-bottom: 1px dotted rgb(61, 170, 214);\">\n<section powered-by=\"xmyeditor.com\" data-md5=\"7ab9d\" style=\"letter-spacing: 1px;line-height: 24px;text-align: justify;\">\n<p style=\"font-size: 15px;\"><span style=\"color: rgb(0, 122, 170);\"><strong>4.PCA\u53ef\u89c6\u5316<\/strong><\/span><\/p>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"font-size: 16px;\">\n<section style=\"margin-bottom: 0px;padding-right: 15px;padding-left: 15px;outline: 0px;font-size: 14px;visibility: visible;\">\n<section style=\"padding-right: 15px;padding-left: 15px;outline: 0px;visibility: visible;\">\n<section class=\"code-snippet__fix code-snippet__js\">\n<ul class=\"code-snippet__line-index code-snippet__js\">\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"makefile\"><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\">#\u81ea\u5b9a\u4e49\u989c\u8272<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">palette = c(<span class=\"code-snippet__string\">\"mediumseagreen\"<\/span>, <span class=\"code-snippet__string\">\"darkorange\"<\/span>, <span class=\"code-snippet__string\">\"royalblue\"<\/span>)<\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\">#\u7ed8\u5236PCA\u9009\u53d6\u7279\u5f81\u4e0b\u6837\u672c\u6563\u70b9\u56fe<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">ggplot(pca.data, aes(x = PC1, y = PC2, color = class)) +<\/span><\/code><code><span class=\"code-snippet_outer\"> geom_point(size = 3) +<\/span><\/code><code><span class=\"code-snippet_outer\"> geom_hline(yintercept = 0) + <\/span><\/code><code><span class=\"code-snippet_outer\"> geom_vline(xintercept = 0) +<\/span><\/code><code><span class=\"code-snippet_outer\"> stat_ellipse(aes(x = PC1, y = PC2), linetype = 2, size = 0.5, level = 0.95, inherit.aes = FALSE) + <\/span><\/code><code><span class=\"code-snippet_outer\"> theme_bw() +<\/span><\/code><code><span class=\"code-snippet_outer\"> scale_color_manual(values = palette) +<\/span><\/code><code><span class=\"code-snippet_outer\"> theme(panel.grid.major.x = element_blank(),<\/span><\/code><code><span class=\"code-snippet_outer\"> panel.grid.minor.x = element_blank(),<\/span><\/code><code><span class=\"code-snippet_outer\"> panel.grid.major.y = element_blank(),<\/span><\/code><code><span class=\"code-snippet_outer\"> panel.grid.minor.y = element_blank()) +<\/span><\/code><code><span class=\"code-snippet_outer\"> labs(x = paste0(<span class=\"code-snippet__string\">\"PC1: \"<\/span>, signif(pca.variance[1] * 100, 3), <span class=\"code-snippet__string\">\"%\"<\/span>), y = paste0(<span class=\"code-snippet__string\">\"PC2: \"<\/span>, signif(pca.variance[2] * 100, 3), <span class=\"code-snippet__string\">\"%\"<\/span>), title=paste0(<span class=\"code-snippet__string\">\"PCA of iris\"<\/span>))+theme(plot.title = element_text(hjust = 0.5))<\/span><\/code><\/pre>\n<\/section>\n<\/section>\n<\/section>\n<p style=\"margin-bottom: 0px;outline: 0px;visibility: visible;\"><br \/><\/p>\n<section data-role=\"title\" data-tools=\"135\u7f16\u8f91\u5668\" data-id=\"104726\">\n<section style=\"text-align: center;margin: 10px auto;\">\n<section style=\"display: inline-block;\">\n<section style=\"background-color: rgb(84, 141, 212);padding: 7px 10px;\">\n<section style=\"display: flex;justify-content: center;align-items: center;\">\n<section style=\"width: 8px;height: 8px;background-color: rgb(255, 255, 255);border-radius: 50%;overflow: hidden;\"><br \/><\/section>\n<section data-brushtype=\"text\" style=\"font-size: 16px;letter-spacing: 1.5px;color: rgb(255, 255, 255);margin-right: 10px;margin-left: 10px;\"><strong>\u7ed3\u679c\u5c55\u793a<\/strong><\/section>\n<section style=\"width: 8px;height: 8px;background-color: rgb(255, 255, 255);border-radius: 50%;\"><br \/><\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<section data-role=\"paragraph\">\n<p><br \/><\/p>\n<p><span style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1;font-size: 14px;\">\u5206\u6790\u6700\u540e\u6211\u4eec\u4f1a\u5f97\u5230\u4e00\u4e2aPCA\u5206\u6790\u56fe\uff0c\u5982\u4e0b\u56fe1\u6240\u793a\uff0c\u56fe\u4e2d\u7684\u6a2a\u7eb5\u5750\u6807\u5206\u522b\u5bf9\u5e94\u4e3b\u6210\u5206PC1\u548cPC2\uff0c\u6574\u4f53\u8868\u73b0\u4e86\u6240\u6709\u6837\u672c\u5728\u8fd9\u4e24\u4e2a\u4e3b\u6210\u5206\u4e0a\u7684\u5206\u5e03\u3002\u540c\u65f6\u5c0f\u4f19\u4f34\u4eec\u8fd8\u53ef\u4ee5\u4fdd\u5b58\u6837\u672c\u5728\u4e3b\u6210\u5206\u4e0a\u7684\u8868\u8fbe\u6c34\u5e73\u6765\u5f00\u5c55\u5176\u4ed6\u5206\u6790\uff0c\u5177\u4f53\u6837\u4f8b\u5982\u56fe2\u6240\u793a\uff0c\u6bcf\u884c\u4e3a\u4e00\u4e2a\u6837\u672c\uff0c\u5217\u4e3a\u4e0d\u540c\u7684\u4e3b\u6210\u5206\u3002<\/span><span style=\"mso-spacerun:'yes';font-family:\u5fae\u8f6f\u96c5\u9ed1;font-size:16.0000pt;mso-font-kerning:1.0000pt;\"><o:p><\/o:p><\/span><\/p>\n<p style=\"text-align: center;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-galleryid=\"\" data-ratio=\"0.47186147186147187\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/3_aibkIgnHAoM5SeNm4EDibXrL31x1PQ.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/sz_mmbiz_png\/zcicibWZessAySluCsI4g499lVRLKEdY2sGoRTac7vmRT0Y3soVJbXZjrNMicaibkIgnHAoM5SeNm4EDibXrL31x1PQ\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"693\" style=\"\" data-recalc-dims=\"1\"><\/p>\n<\/section>\n<p style=\"text-align: center;\"><span style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1;color: rgb(136, 136, 136);font-size: 12px;\">\u56fe1 \u4e3b\u6210\u5206\u5206\u6790\u56fe<\/span><\/p>\n<p style=\"text-align: center;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-galleryid=\"\" data-ratio=\"0.3225152129817444\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/4_SZ1Hq0HqI0W9D6keth44seeEYSx01g.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/sz_mmbiz_png\/zcicibWZessAySluCsI4g499lVRLKEdY2sDWjCZfftZTcCo0sPleiaAd7YBSZ1Hq0HqI0W9D6keth44seeEYSx01g\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"493\" style=\"\" data-recalc-dims=\"1\" \/><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1;font-size: 12px;color: rgb(136, 136, 136);\">\u56fe2 \u6837\u672c\u4e3b\u6210\u5206\u8868\u8fbe\u77e9\u9635\u6837\u4f8b<\/span><span style=\"mso-spacerun:'yes';font-family:\u5fae\u8f6f\u96c5\u9ed1;font-size:16.0000pt;mso-font-kerning:1.0000pt;\"><o:p><\/o:p><\/span><\/p>\n<p><span style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1;font-size: 14px;\">\u5927\u529f\u544a\u6210\uff01\u5206\u6790\u5230\u8fd9\u91cc\u5c31\u7ed3\u675f\u4e86\uff0c\u76f8\u4fe1\u5927\u5bb6\u5df2\u7ecf\u638c\u63e1\u4e86\uff0c\u611f\u5174\u8da3\u7684\u5c0f\u4f19\u4f34\u5feb\u53bb\u8bd5\u8bd5\u5427\uff01<\/span><\/p>\n<p style=\"text-align: center;\"><br \/><\/p>\n<p><span style=\"font-size: 14px;color: rgb(0, 122, 170);\">\u8fd9\u91cc\u63a8\u8350\u4e00\u4e0b\u5c0f\u679c\u65b0\u5f00\u53d1\u7684\u96f6\u4ee3\u7801\u4e91\u751f\u4fe1\u5206\u6790\u5de5\u5177\u5e73\u53f0\u5305\u542b\u8d85\u591a\u96f6\u4ee3\u7801\u5c0f\u5de5\u5177\uff0c\u4e0a\u4f20\u6570\u636e\u4e00\u952e\u51fa\u56fe\uff0c\u611f\u5174\u8da3\u7684\u5c0f\u4f19\u4f34\u6b22\u8fce\u4e86\u89e3~<\/span><\/p>\n<p><span style=\"font-size: 14px;color: rgb(0, 122, 170);\">\u7f51\u5740\uff1ahttp:\/\/www.biocloudservice.com\/home.html<\/span><span style=\"text-align: center;letter-spacing: 0.578px;\"><\/span><span style=\"color: rgb(0, 122, 170);font-size: 14px;letter-spacing: 0.578px;\"><\/span><\/p>\n<p><br \/><\/p>\n<section data-id=\"75061\" data-type=\"lspecial02\" data-tools=\"\u901f\u6392\u5c0f\u8682\u8681\u7f16\u8f91\u5668\" powered-by=\"xmyeditor.com\" data-md5=\"83a15\">\n<p><span style=\"font-size: 14px;\">\u4eca\u5929\u5c0f\u679c\u7684\u5206\u4eab\u5c31\u5230\u8fd9\u91cc\uff0c\u6b22\u8fce\u5927\u5bb6\u548c\u5c0f\u679c\u4e00\u8d77\u8ba8\u8bba\u5b66\u4e60\uff0c\u4e0b\u671f\u518d\u89c1\u54e6\uff01<\/span><\/p>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"outline: 0px;visibility: visible;\">\n<section data-role=\"list\" style=\"outline: 0px;visibility: visible;\">\n<section style=\"outline: 0px;visibility: visible;\">\n<section powered-by=\"xiumi.us\" style=\"outline: 0px;visibility: visible;\">\n<section style=\"outline: 0px;visibility: visible;\">\n<section style=\"padding-right: 15px;padding-left: 15px;outline: 0px;font-size: 14px;\">\n<section powered-by=\"xiumi.us\" style=\"outline: 0px;height: auto;transform: perspective(0px);transform-style: flat;\">\n<section style=\"margin-top: 10px;margin-bottom: -3px;outline: 0px;text-align: left;justify-content: flex-start;display: flex;flex-flow: row nowrap;transform: translate3d(19px, 0px, 0px) rotateX(180deg);\">\n<section style=\"outline: 0px;display: inline-block;vertical-align: top;width: auto;align-self: flex-start;flex: 0 0 auto;min-width: 5%;height: auto;\">\n<section powered-by=\"xiumi.us\" style=\"outline: 0px;text-align: center;\">\n<section style=\"outline: 0px;display: inline-block;width: 6px;height: 6px;vertical-align: top;overflow: hidden;border-radius: 230px;background-color: rgb(217, 217, 217);\">\n<section powered-by=\"xiumi.us\" style=\"outline: 0px;text-align: justify;\">\n<p style=\"outline: 0px;\"><br style=\"outline: 0px;\" \/><\/p>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"outline: 0px;display: inline-block;vertical-align: top;width: auto;align-self: flex-start;flex: 0 0 auto;min-width: 5%;height: auto;\">\n<section powered-by=\"xiumi.us\" style=\"outline: 0px;text-align: center;\">\n<section style=\"outline: 0px;display: inline-block;width: 6px;height: 6px;vertical-align: top;overflow: hidden;border-radius: 230px;background-color: rgb(217, 217, 217);\">\n<section powered-by=\"xiumi.us\" style=\"outline: 0px;text-align: justify;\">\n<p style=\"outline: 0px;\"><br style=\"outline: 0px;\" \/><\/p>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"outline: 0px;display: inline-block;vertical-align: top;width: auto;align-self: flex-start;flex: 0 0 auto;min-width: 5%;height: auto;\">\n<section powered-by=\"xiumi.us\" style=\"outline: 0px;text-align: center;\">\n<section style=\"outline: 0px;display: inline-block;width: 6px;height: 6px;vertical-align: top;overflow: hidden;border-radius: 230px;background-color: rgb(217, 217, 217);\">\n<section powered-by=\"xiumi.us\" style=\"outline: 0px;text-align: justify;\">\n<p style=\"outline: 0px;\"><br style=\"outline: 0px;\" \/><\/p>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<section powered-by=\"xiumi.us\" style=\"margin-bottom: 10px;outline: 0px;text-align: left;justify-content: flex-start;display: flex;flex-flow: row nowrap;\">\n<section style=\"padding: 14px 10px;outline: 0px;display: inline-block;width: 647px;vertical-align: top;align-self: flex-start;flex: 0 0 auto;border-style: solid;border-width: 1px;border-color: rgb(217, 217, 217);\">\n<section powered-by=\"xiumi.us\" style=\"margin-top: 10px;margin-bottom: 15px;outline: 0px;justify-content: flex-start;display: flex;flex-flow: row nowrap;\">\n<section style=\"padding-left: 9px;outline: 0px;display: inline-block;width: 625px;vertical-align: top;align-self: flex-start;flex: 0 0 auto;border-style: solid;border-width: 0px 0px 0px 12px;border-left-color: rgb(212, 32, 2);\">\n<section powered-by=\"xiumi.us\" style=\"outline: 0px;text-align: justify;font-size: 17px;color: rgb(62, 62, 62);\">\n<p style=\"outline: 0px;\"><strong style=\"outline: 0px;\">\u5c0f\u679c\u53cb\u60c5\u63a8\u8350<\/strong><\/p>\n<\/section>\n<section powered-by=\"xiumi.us\" style=\"margin-top: 3px;outline: 0px;\">\n<section style=\"outline: 0px;background-color: rgb(217, 217, 217);height: 1px;\"><svg viewbox=\"0 0 1 1\" style=\"float:left;line-height:0;width:0;vertical-align:top;\"><\/svg><\/section>\n<\/section>\n<section powered-by=\"xiumi.us\" style=\"outline: 0px;text-align: justify;font-size: 11px;color: rgb(62, 62, 62);\">\n<p style=\"outline: 0px;\">\u597d\u7528\u53c8\u514d\u8d39\u7684\u5de5\u5177\u5b89\u5229<\/p>\n<\/section>\n<\/section>\n<\/section>\n<section powered-by=\"xiumi.us\" style=\"margin-top: 10px;margin-bottom: 10px;outline: 0px;text-align: center;line-height: 0;\">\n<section style=\"outline: 0px;vertical-align: middle;display: inline-block;line-height: 0;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"0.35777777777777775\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/5_eVibso6VJox4Hnic0n53VnLS1A9qYA-8.jpg?w=640\" 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