{"id":310,"date":"2018-01-17T23:42:49","date_gmt":"2018-01-17T15:42:49","guid":{"rendered":"http:\/\/www.91tfboys.com\/?p=310"},"modified":"2019-04-02T15:36:20","modified_gmt":"2019-04-02T07:36:20","slug":"%e6%b1%82%e4%bd%99%e5%bc%a6%e7%9b%b8%e4%bc%bc%e5%ba%a6","status":"publish","type":"post","link":"https:\/\/www.91tfboys.com\/?p=310","title":{"rendered":"\u6c42\u5411\u91cf\u7684\u4f59\u5f26\u76f8\u4f3c\u5ea6\u548c\u6b27\u6c0f\u8ddd\u79bb"},"content":{"rendered":"<p>\u90e8\u5206\u793a\u610f\u4ee3\u7801\uff0c\u4ec5\u4f5cDemo\u4f7f\u7528\uff0c\u672a\u4f5c\u4e25\u683c\u7684\u53c2\u6570\u68c0\u67e5\u7b49\u3002<\/p>\n<p><!--more--><br \/>\n\u516c\u5f0f\uff1acos(<strong><em>q<\/em><\/strong>,<strong><em>d<\/em><\/strong>) = <strong><em>q<\/em><\/strong>\u00b7<strong><em>d\u00a0<\/em><\/strong>\/ (|<strong><em>q<\/em><\/strong>||<strong><em>d<\/em><\/strong>|)<\/p>\n<p>\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n<pre>def guiyi(x):\r\n    fenmu = sqrt(sum(pow(xi, 2) for xi in x))\r\n    return [xi\/fenmu for xi in x]\r\n\r\ndef cos(a, b):\r\n    return sum(ai*bi for ai,bi in zip(a, b))\r\n<\/pre>\n<p>\u4e0a\u8ff0\u4ee3\u7801\u9002\u7528\u4e8e\u591a\u7ef4\u5411\u91cf\u9700\u8981\u4e24\u4e24\u4e4b\u95f4\u6c42\u76f8\u4f3c\u5ea6\u7684\u60c5\u666f\u3002\u4e0b\u9762\u7684\u4ee3\u7801\u5c06\u76f4\u63a5\u6c42\u5f97\u4e24\u4e2a\u5411\u91cf\u7684\u4f59\u5f26\u76f8\u4f3c\u5ea6\u3002<\/p>\n<pre>def sim(a, b):\r\n    return sum(ai * bi for ai, bi in zip(a, b)) \/ (sqrt(sum(ai ** 2 for ai in a)) * sqrt(sum(bi ** 2 for bi in b)))\r\n<\/pre>\n<p>\u516c\u5f0f\uff1a|<strong><em>x<\/em><\/strong>&#8211;<strong><em>y<\/em><\/strong>|=\u221a\u03a3(<em>x<\/em><sub>i<\/sub>&#8211;<em>y<\/em><sub>i<\/sub>)<sup>2<\/sup><\/p>\n<p>\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n<pre>def euc(a, b):\r\n    return sqrt(sum((ai - bi) ** 2 for ai, bi in zip(a, b)))\r\n<\/pre>\n<p>\u9644\uff1a<br \/>\n\u6c42\u5411\u91cf\u5185\u79ef\u7684\u4ee3\u7801\u3002<\/p>\n<pre>def s(a, b):\r\n    return sum(ai * bi for ai, bi in zip(a, b))\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u90e8\u5206\u793a\u610f\u4ee3\u7801\uff0c\u4ec5\u4f5cDemo\u4f7f\u7528\uff0c\u672a\u4f5c\u4e25\u683c\u7684\u53c2\u6570\u68c0\u67e5\u7b49\u3002<\/p>\n","protected":false},"author":1,"featured_media":249,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[18,20],"class_list":["post-310","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-coding","tag-python","tag-20"],"_links":{"self":[{"href":"https:\/\/www.91tfboys.com\/index.php?rest_route=\/wp\/v2\/posts\/310","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.91tfboys.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.91tfboys.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.91tfboys.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.91tfboys.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=310"}],"version-history":[{"count":3,"href":"https:\/\/www.91tfboys.com\/index.php?rest_route=\/wp\/v2\/posts\/310\/revisions"}],"predecessor-version":[{"id":314,"href":"https:\/\/www.91tfboys.com\/index.php?rest_route=\/wp\/v2\/posts\/310\/revisions\/314"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.91tfboys.com\/index.php?rest_route=\/wp\/v2\/media\/249"}],"wp:attachment":[{"href":"https:\/\/www.91tfboys.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=310"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.91tfboys.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=310"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.91tfboys.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=310"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}