{"id":2470,"date":"2023-03-27T22:48:45","date_gmt":"2023-03-27T14:48:45","guid":{"rendered":"http:\/\/103.118.41.220\/docs\/?p=2470"},"modified":"2024-04-07T21:40:35","modified_gmt":"2024-04-07T13:40:35","slug":"tsne","status":"publish","type":"post","link":"https:\/\/www.khsci.com\/docs\/index.php\/2023\/03\/27\/tsne\/","title":{"rendered":"t-SNE\u964d\u7ef4\u7b97\u6cd5"},"content":{"rendered":"\n<h4 class=\"wp-block-heading\" id=\"block-cb278d17-b071-4090-8ba7-00df72c6c1c5\"><strong>\u4e00\u3001\u4ee3\u7801\u8fd0\u884c\u73af\u5883<\/strong><\/h4>\n\n\n\n<p id=\"block-95b89524-033d-4f81-8078-d6e86521e83e\">MATLAB2017a\u53ca\u66f4\u65b0\u7248\u672c\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\u4e8c\u3001\u7a0b\u5e8f\u4ecb\u7ecd<\/strong><\/h4>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"117\" height=\"59\" src=\"https:\/\/khsci.com\/docs\/wp-content\/uploads\/2023\/03\/image-12.png\" alt=\"\" class=\"wp-image-2471\"\/><\/figure><\/div>\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/khsci.com\/docs\/wp-content\/uploads\/2023\/03\/image-5.png\" alt=\"\u6b64\u56fe\u50cf\u7684alt\u5c5e\u6027\u4e3a\u7a7a\uff1b\u6587\u4ef6\u540d\u4e3aimage-5.png\"\/><\/figure>\n\n\n\n<p id=\"block-406d57bd-a8a5-4417-9255-5096a9ef59a0\"><strong>1.demo_tSNE.m\u6587\u4ef6<\/strong><\/p>\n\n\n\n<p id=\"block-8494d08f-e9df-4cf4-9bee-b06eeec42d22\">t\u5206\u5e03-\u968f\u673a\u90bb\u8fd1\u5d4c\u5165t-SNE\u964d\u7ef4\u51fd\u6570kTSNE.m\u7684\u6d4b\u8bd5\u811a\u672c\u6587\u4ef6\uff0c\u53ef\u4ee5\u76f4\u63a5\u8fd0\u884c\u3002\u7a0b\u5e8f\u8fd0\u884c\u5b8c\u6210\u540e\uff0c\u4f1a\u7ed8\u5236\u51fa\u5982\u4e0b\u4e00\u5f20\u56fe\uff1a<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"517\" height=\"400\" src=\"https:\/\/khsci.com\/docs\/wp-content\/uploads\/2023\/03\/image-13.png\" alt=\"\" class=\"wp-image-2472\" srcset=\"https:\/\/www.khsci.com\/docs\/wp-content\/uploads\/2023\/03\/image-13.png 517w, https:\/\/www.khsci.com\/docs\/wp-content\/uploads\/2023\/03\/image-13-300x232.png 300w\" sizes=\"(max-width: 517px) 100vw, 517px\" \/><\/figure><\/div>\n\n\n<p id=\"block-68272bd1-ec20-4875-b924-8558a4074c2c\">\u6b64\u65f6\u5728\u5de5\u4f5c\u533a\u80fd\u627e\u5230t-SNE\u964d\u7ef4\u540e\u7684\u53d8\u91cf\uff1arsneFea<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"234\" height=\"105\" src=\"https:\/\/khsci.com\/docs\/wp-content\/uploads\/2023\/03\/image-14.png\" alt=\"\" class=\"wp-image-2473\"\/><\/figure><\/div>\n\n\n<p>\u53e6\u5916\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-matlab\">options.NumDimensions = 2 ;  %\u964d\u7ef4\u540e\u7684\u6570\u636e\u7ef4\u5ea6\uff0c\u9ed8\u8ba4\u4e3a2<\/code><\/pre>\n\n\n\n<p>\u6539\u6210<\/p>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-\">options.NumDimensions = 3 ; %\u964d\u7ef4\u540e\u7684\u6570\u636e\u7ef4\u5ea6\uff0c\u9ed8\u8ba4\u4e3a2<\/code><\/pre>\n\n\n\n<p>\u4e4b\u540e\uff0c\u91cd\u65b0\u8fd0\u884c\uff0c\u5c06\u4f1a\u7ed8\u5236\u51fa\u4e0b\u56fe\uff1a<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"528\" height=\"393\" src=\"https:\/\/khsci.com\/docs\/wp-content\/uploads\/2023\/03\/image-15.png\" alt=\"\" class=\"wp-image-2474\" srcset=\"https:\/\/www.khsci.com\/docs\/wp-content\/uploads\/2023\/03\/image-15.png 528w, https:\/\/www.khsci.com\/docs\/wp-content\/uploads\/2023\/03\/image-15-300x223.png 300w\" sizes=\"(max-width: 528px) 100vw, 528px\" \/><\/figure><\/div>\n\n\n<p id=\"block-15c01dcd-4e10-4184-a8c7-2e6ba7caccf4\"><strong>2.kTSNE.m\u6587\u4ef6<\/strong><\/p>\n\n\n\n<p id=\"block-65fb01dc-7154-4ab7-8225-e9bba3c1b92d\">t-SNE\u964d\u7ef4\u548c\u753b\u56fe\u7684\u4e3b\u51fd\u6570\u6587\u4ef6\u3002<\/p>\n\n\n\n<p id=\"block-7c277aef-aafd-4b07-ba92-fbcb3f938114\">t-SNE\u964d\u7ef4\u4ee5\u53ca\u753b\u56fe\u529f\u80fd\u5168\u90e8\u5c01\u88c5\u5728\u6b64\u51fd\u6570\u3002\u6ce8\u610f\u4e0d\u80fd\u76f4\u63a5\u8fd0\u884c\u8be5\u51fd\u6570\u6587\u4ef6\uff0c\u800c\u8981\u53c2\u7167<strong>demo_tSNE.m\u6587\u4ef6<\/strong>\u7684\u5199\u6cd5\u8fdb\u884c\u51fd\u6570\u8c03\u7528\u3002<\/p>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-matlab\">function tsneVal = kTSNE(Fea,options,species,figflag)\n%% \u6267\u884c\u6570\u636e\u7684t-sne\u964d\u7ef4\uff0c\u9700\u8981MATLAB2017a\u53ca\u4ee5\u4e0a\u7248\u672c\n%% \u53ef\u4ee5\u5b9e\u73b02\u7ef4\u30013\u7ef4\u4ee5\u53ca\u66f4\u9ad8\u7ef4\u5ea6\u7684\u964d\u7ef4\uff0c\u53ea\u6709\u4e8c\u7ef4\u548c\u4e09\u7ef4\u53ef\u4ee5\u753b\u56fe\n% \u8f93\u5165\uff1a\n% Fea\uff1a\u5f85\u964d\u7ef4\u6570\u636e\uff0cR*Q\u7684\u77e9\u9635\uff0cR\u4e3a\u6279\u6b21\u6570\uff0cQ\u4e3a\u7279\u5f81\u7ef4\u5ea6\uff0c\u4f8b\u5982\u7279\u5f81\u7ef4\u5ea6\u4e3a8\u7684\u5171100\u7ec4\u6570\uff0ctempFea\u7684\u7ef4\u5ea6\u5e94\u4e3a100*8\u3002\u8f93\u5165\u8be5\u53d8\u91cf\u65f6\u4e00\u5b9a\u8981\u6ce8\u610f\u884c\u5217\u65b9\u5411\u662f\u5426\u6b63\u786e\uff0c\u5982\u4e0d\u6b63\u786e\u9700\u8981\u8f6c\u7f6e\n% options\uff1a\u4e00\u4e9b\u4e0etsne\u964d\u7ef4\u6709\u5173\u7684\u8bbe\u7f6e\uff0c\u4f7f\u7528\u7ed3\u6784\u4f53\u65b9\u5f0f\u8d4b\u503c\uff0c\u6bd4\u5982 options.Algorithm = &#039;barneshut&#039;\uff0c\u5177\u4f53\u5305\u62ec\uff1a\n%              -Algorithm\uff1atsne\u7b97\u6cd5\uff0c\u53ef\u9009\uff1a&#039;barneshut&#039; (\u9ed8\u8ba4) |&#039;exact&#039;\u3002\u5176\u4e2d&#039;barneshut&#039;\u6267\u884c\u8fd1\u4f3c\u4f18\u5316\uff0c\u6570\u636e\u91cf\u5927\u65f6\uff0c\u901f\u5ea6\u66f4\u5feb\u3002\n%              -Distance\uff1a\u8ddd\u79bb\u91cf\u5ea6\u65b9\u6cd5\u9009\u62e9\uff0c\u53ef\u9009\uff1a&#039;euclidean&#039; (default) | &#039;seuclidean&#039; | &#039;cityblock&#039; | &#039;chebychev&#039; | &#039;minkowski&#039; | &#039;mahalanobis&#039; | &#039;cosine&#039; | &#039;correlation&#039; | &#039;spearman&#039; | &#039;hamming&#039; | &#039;jaccard&#039;\n%                         \u5177\u4f53\u63cf\u8ff0\u89c1\uff1ahttps:\/\/ww2.mathworks.cn\/help\/stats\/tsne.html?s_tid=doc_ta\n%              -Exaggeration\uff1a\u6570\u636e\u4e2d\u81ea\u7136\u805a\u7c7b\u7684\u5927\u5c0f\uff0c\u6574\u578b\u6570\u636e\uff0c\u9ed8\u8ba4\u4e3a4\n%              -NumDimensions\uff1a\u964d\u7ef4\u540e\u7684\u6570\u636e\u7ef4\u5ea6\uff0c\u9ed8\u8ba4\u4e3a2\n%              -LearnRate\uff1a\u4f18\u5316\u8fc7\u7a0b\u7684\u5b66\u4e60\u901f\u7387\uff0c\u6307\u5b9a\u4e3a\u6b63\u6807\u91cf\u3002\u901a\u5e38\u8bbe\u7f6e\u503c\u4e3a100\u52301000\u3002\n%              -Standardize\uff1a\u8f93\u5165\u6570\u636e\u662f\u5426\u8fdb\u884c\u6807\u51c6\u5316\uff0cfalse (\u9ed8\u8ba4) | true\n%              -Perplexity\uff1a\u56f0\u60d1\u5ea6\u3002\u5373\u6bcf\u4e2a\u70b9\u7684\u6709\u6548\u5c40\u90e8\u90bb\u5c45\u6570\uff0c\u6307\u5b9a\u4e3a\u6b63\u6807\u91cf\u3002\u66f4\u5927\u7684\u56f0\u60d1\u5ea6\u4f1a\u4f7f\u66f4\u591a\u7684\u70b9\u4f5c\u4e3a\u6700\u8fd1\u7684\u90bb\u5c45\u3002\u4e00\u822c\u60c5\u51b5\u4e0b\uff0c\u56f0\u60d1\u5ea6\u503c\u7684\u8303\u56f4\u57285\u523050\u4e4b\u95f4\n% species\uff1a\u5206\u7ec4\u53d8\u91cf\uff0c\u53ef\u4ee5\u662f\u6570\u7ec4\u3001\u6570\u503c\u5411\u91cf\u3001\u5b57\u7b26\u6570\u7ec4\u3001\u5b57\u7b26\u4e32\u6570\u7ec4\u7b49\uff0c\u4f46\u662f\u9700\u8981\u6ce8\u610f\u6b64\u53d8\u91cf\u7ef4\u5ea6\u9700\u8981\u4e0eFea\u7684\u7ec4\u6570\u4e00\u81f4\u3002\u8be5\u53d8\u91cf\u53ef\u4ee5\u4e0d\u8d4b\u503c\uff0c\u8c03\u7528\u65f6\u5bf9\u5e94\u4f4d\u7f6e\u5199\u4e3a[]\u5373\u53ef\n%          \u4f8b\u5982species\u53ef\u4ee5\u662f[1,1,1,2,2,2,3,3,3]\u8fd9\u6837\u7684\u6570\u7ec4\uff0c\u4ee3\u8868\u4e86Fea\u524d3\u884c\u6570\u636e\u4e3a\u7b2c1\u7ec4\uff0c4-6\u884c\u6570\u636e\u4e3a\u7b2c2\u7ec4\uff0c7-9\u884c\u6570\u636e\u4e3a\u7b2c\u4e09\u7ec4\u3002\n%          \u5173\u4e8e\u6b64species\u53d8\u91cf\u66f4\u591a\u4fe1\u606f\uff0c\u53ef\u4ee5\u67e5\u770b\u4e0b\u8ff0\u94fe\u63a5\u4e2d\u7684&quot;Grouping variable&quot;\uff1a\n%          https:\/\/ww2.mathworks.cn\/help\/stats\/gscatter.html?s_tid=doc_ta#d124e492252\n% \n% figflag\uff1a\u662f\u5426\u753b\u56fe\uff0c&#039;on&#039;\u4e3a\u753b\u56fe\uff0c&#039;off&#039;\u4e3a\u4e0d\u753b\uff0c\u53ea\u6709NumDimensions\u4e3a2\u6216\u80053\u65f6\u8d77\u4f5c\u7528\uff0c3\u4ee5\u4e0a\u65e0\u6cd5\u753b\u56fe<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"block-61838eec-3df8-46f4-a575-b9ce8b6eb661\">\u4e09\u3001\u5feb\u901f\u5f00\u59cb<\/h4>\n\n\n\n<p id=\"block-59495999-23d1-456a-a201-7b0bc5356ff3\"><strong>1.\u8fd0\u884c\u6d4b\u8bd5\u811a\u672c<\/strong><\/p>\n\n\n\n<p id=\"block-6affdb03-31c3-4467-bb41-eb90605d323e\">\u5148\u5728MATLAB\u91cc\u6253\u5f00\u4e0b\u8f7d\u597d\u7684\u6587\u4ef6\u5939\uff0c\u7136\u540e\u8fd0\u884c<strong><strong>demo_tSNE<\/strong>.m<\/strong>\u7a0b\u5e8f\uff0c\u7a0b\u5e8f\u8fd0\u884c\u5b8c\u6bd5\u540e\u5982\u679c\u6ca1\u62a5\u9519\uff0c\u4e14\u6b63\u5e38\u753b\u51fa\u5206\u5e03\u56fe\u50cf\uff0c\u5219\u8bf4\u660e\u8fd0\u884c\u73af\u5883\u6b63\u5e38\uff0c\u7a0b\u5e8f\u6b63\u786e\u3002<\/p>\n\n\n\n<p id=\"block-c9b8bfc7-00ba-4629-9e9d-0530c22d0818\"><strong>2.\u4fee\u6539\u4eff\u771f\u6570\u636e\/\u5bfc\u5165\u6570\u636e<\/strong><\/p>\n\n\n\n<p id=\"block-ee6cddc5-df89-45b2-adcd-85e1d12a9123\">\u590d\u5236\u4e00\u4e2a<strong><strong><strong>demo_tSNE<\/strong><\/strong>.m<\/strong>\u7684\u6587\u4ef6\u526f\u672c\uff0c\u5728\u8fd9\u4e2a\u526f\u672c\u91cc\u505a\u5982\u4e0b\u4fee\u6539\uff1a<\/p>\n\n\n\n<p id=\"block-a3244f5d-03d2-472d-ae2e-ae6566ecfcfe\">\uff081\uff09\u7b2c\u4e00\u79cd\u60c5\u51b5\uff0c\u4f60\u53ef\u80fd\u60f3\u8981\u5bf9\u4f60\u81ea\u5df1\u8981\u7814\u7a76\u7684<strong>\u6570\u636e<\/strong>\u8fdb\u884c\u964d\u7ef4\uff0c\u6b64\u65f6\u4f60\u9700\u8981\u5bf9&nbsp;<strong><strong><strong>demo_tSNE<\/strong><\/strong>.m<\/strong>&nbsp;\u811a\u672c\u6587\u4ef6\u4e2d\u7684\u7b2c1\u5c0f\u8282\u5185\u5bb9\u8fdb\u884c\u4fee\u6539\u66ff\u6362\u5373\u53ef\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u8bf7\u6700\u597d<strong>\u4fdd\u6301\u53d8\u91cf\u540d\u7684\u4e00\u81f4<\/strong>\uff0c\u5373\u5c06\u5f85\u964d\u7ef4\u7684\u77e9\u9635\u547d\u540d\u4e3adata\u3002\u6b64\u65f6\u6570\u636e\u66ff\u6362\u5b8c\u6210\u3002<\/p>\n\n\n\n<p id=\"block-eaef9b99-5232-4de5-b49c-b17b87b6b2c0\">\uff082\uff09\u7b2c\u4e8c\u79cd\u60c5\u51b5\uff0c\u4f60\u53ef\u80fd\u662f\u60f3\u5bf9\u4e00\u6bb5<strong>\u771f\u5b9e\u91c7\u96c6<\/strong>\u7684\u6570\u636e\u8fdb\u884c\u6ee4\u6ce2\uff0c\u6b64\u65f6\u9700\u8981\u6839\u636e\u4f60\u7684\u6587\u4ef6\u7c7b\u578b\u7684\u4e0d\u540c\uff08excel,txt,csv\u7b49\uff09\uff0c\u5c06\u6570\u636e\u5bfc\u5165MATLAB\u7684\u65b9\u6cd5\u6709\u6240\u4e0d\u540c\u3002\u540c\u5b66\u4eec\u53ef\u4ee5\u770b\u535a\u4e3b\u9488\u5bf9\u5e38\u7528\u6587\u4ef6\u7684\u5bfc\u5165\u65b9\u6cd5\u7684<a href=\"https:\/\/khsci.com\/docs\/index.php\/2020\/05\/17\/loaddata\/\">\u8fd9\u4e2a\u6559\u7a0b<\/a>\uff0c\u6559\u7a0b\u4e0a\u672a\u5305\u542b\u7684\u6570\u636e\u7c7b\u578b\uff0c\u5927\u5bb6\u53ef\u4ee5\u518d\u53c2\u8003<a href=\"https:\/\/ww2.mathworks.cn\/help\/matlab\/standard-file-formats.html\">\u8fd9\u4e2a\u6587\u6863<\/a>\u3002<strong>\u5bfc\u5165\u5b8c\u6210\u540e\u8bf7\u5c06\u8fd9\u4e2a\u5f85\u964d\u7ef4\u4fe1\u53f7\u547d\u540d\u4e3adata<\/strong>\u3002<\/p>\n\n\n\n<p id=\"block-26d1f199-4dc9-4e5d-bf2d-3886f207be7d\"><strong>3.\u5b9e\u73b0t-SNE\u964d\u7ef4<\/strong><\/p>\n\n\n\n<p id=\"block-9ee601ac-ce6f-4134-b9ce-44b72fb7b313\">\u53c2\u7167&nbsp;<strong><strong><strong>demo_tSNE<\/strong><\/strong>.m<\/strong>\u6587\u4ef6\u4e2d\u7b2c\u4e8c\u6b65\uff0c\u6309\u7167\u5b9e\u9645\u9700\u6c42\u8bbe\u7f6eoptions.NumDimensions \u3001options.Standardize\u3001options.Exaggeration\u3001options.Perplexity\u3001options.LearnRate\u3001\u53cafigflag\u7b49\u53c2\u6570\u7684\u503c\u3002<\/p>\n\n\n\n<p id=\"block-7db3fba3-22d7-40e2-a0ad-44daa709b0f5\">\u8fd0\u884c\u7a0b\u5e8f\u5373\u53ef\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"block-e781d537-3b29-41b3-abbd-72eed52eb41c\">\u56db\u3001\u5173\u4e8e\u5b8c\u6574\u7248\u4e0e\u516c\u5f00\u7248\u4ee3\u7801<\/h4>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>\u529f\u80fd<\/strong><\/td><td><strong>\u5b8c\u6574\u7248<\/strong><\/td><td><strong>\u516c\u5f00\u7248<\/strong><\/td><\/tr><tr><td>\u6570\u636e\u5bfc\u5165\u3001\u53c2\u6570\u8bbe\u7f6e\u3001\u5b9e\u73b0t-SNE\u964d\u7ef4<\/td><td>\u221a<\/td><td>\u221a<\/td><\/tr><tr><td>\u8f6f\u4ef6\u5168\u90e8\u6e90\u7801\uff08\u51fd\u6570m\u6587\u4ef6\uff09<\/td><td>\u221a<\/td><td>\u00d7<\/td><\/tr><tr><td>\u753b\u56fe\u65e0\u6c34\u5370<\/td><td>\u221a<\/td><td>\u00d7<\/td><\/tr><tr><td>\u964d\u7ef4\u6570\u636e\u957f\u5ea6<\/td><td>\u65e0\u9650\u5236<\/td><td>150\u4ee5\u5185<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"block-88e896b7-2572-480b-97d1-7845c6ee4ddf\">\u4e94\u3001\u83b7\u53d6\u516c\u5f00\u7248\u7a0b\u5e8f\uff08\u9700\u4f7f\u7528\u7535\u8111\u6d4f\u89c8\u5668\u6253\u5f00\uff09<\/h4>\n\n\n\n<div class=\"wpfd-single-file\">\n\n    <div class=\"wpfd-single-file--details wpfd-file-content\">\n                <h3 class=\"wpfd-file-content--title\">tSNE\u4ee3\u7801\uff08\u516c\u5f00\u7248\uff09<\/h3>\n        <div class=\"wpfd-file-content--meta\">\n                    <div>\u6587\u4ef6\u5c3a\u5bf8: 20.94 KB<\/div>\n                    <div>\u66f4\u65b0: 18-06-2023<\/div>\n        <\/div>\n    <\/div>\n    <div class=\"wpfd-single-file--buttons\">\n                <a href=\"https:\/\/www.khsci.com\/docs\/index.php\/download\/6\/%e6%96%b0%e5%88%86%e7%b1%bb\/2789\/tsne%e4%bb%a3%e7%a0%81%ef%bc%88%e5%85%ac%e5%bc%80%e7%89%88%ef%bc%89.zip\"  data-id=\"2789\" title=\"tSNE\u4ee3\u7801\uff08\u516c\u5f00\u7248\uff09\" class=\"noLightbox wpfd_downloadlink wpfd-single-file-button 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