{"id":5717,"date":"2023-01-06T14:45:53","date_gmt":"2023-01-06T06:45:53","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=5717"},"modified":"2023-01-06T14:45:53","modified_gmt":"2023-01-06T06:45:53","slug":"%e4%bd%bf%e7%94%a8react-js%e6%b1%82%e5%8f%96%e6%a8%99%e6%ba%96%e5%b7%ae","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/react-js\/%e4%bd%bf%e7%94%a8react-js%e6%b1%82%e5%8f%96%e6%a8%99%e6%ba%96%e5%b7%ae\/","title":{"rendered":"\u4f7f\u7528React.JS\u6c42\u53d6\u6a19\u6e96\u5dee"},"content":{"rendered":"

<\/p>\n

\u4f7f\u7528 React.JS \u6c42 List \u7684\u6807\u51c6\u5dee (standard deviation)<\/h1>\n

React.JS \u662f\u4e00\u500b\u7528\u65bc\u69cb\u5efa\u7528\u6236\u7aef\u61c9\u7528\u7a0b\u5e8f\u7684 JavaScript \u6846\u67b6\uff0c\u5b83\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u5feb\u901f\u69cb\u5efa\u51fa\u9ad8\u54c1\u8cea\u7684\u7528\u6236\u7aef\u61c9\u7528\u7a0b\u5e8f\u3002\u5728 React.JS \u4e2d\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u4f7f\u7528 List \u7d44\u4ef6\u4f86\u5feb\u901f\u69cb\u5efa\u51fa\u4e00\u500b List\uff0c\u4e26\u4e14\u53ef\u4ee5\u4f7f\u7528\u5b83\u4f86\u6c42\u51fa List \u4e2d\u6578\u64da\u7684\u6807\u51c6\u5dee (standard deviation)\u3002<\/p>\n

\u4ec0\u9ebc\u662f\u6807\u51c6\u5dee (standard deviation)<\/h2>\n

\u6807\u51c6\u5dee (standard deviation) \u662f\u4e00\u500b\u7d71\u8a08\u5b78\u4e2d\u7684\u6982\u5ff5\uff0c\u5b83\u8868\u793a\u4e00\u7d44\u6578\u64da\u7684\u5206\u6563\u7a0b\u5ea6\u3002\u5b83\u662f\u4e00\u500b\u6578\u503c\uff0c\u8868\u793a\u4e00\u7d44\u6578\u64da\u7684\u5e73\u5747\u503c\u8207\u6bcf\u500b\u6578\u64da\u4e4b\u9593\u7684\u5dee\u8ddd\u3002\u8f03\u5927\u7684\u6807\u51c6\u5dee\u8868\u793a\u8a72\u7d44\u6578\u64da\u7684\u5206\u6563\u7a0b\u5ea6\u8f03\u5927\uff0c\u8f03\u5c0f\u7684\u6807\u51c6\u5dee\u8868\u793a\u8a72\u7d44\u6578\u64da\u7684\u5206\u6563\u7a0b\u5ea6\u8f03\u5c0f\u3002<\/p>\n

\u5982\u4f55\u4f7f\u7528 React.JS \u6c42 List \u7684\u6807\u51c6\u5dee (standard deviation)<\/h2>\n

\u4f7f\u7528 React.JS \u6c42 List \u7684\u6807\u51c6\u5dee (standard deviation) \u975e\u5e38\u7c21\u55ae\uff0c\u53ea\u9700\u8981\u4f7f\u7528 List \u7d44\u4ef6\u5c31\u53ef\u4ee5\u5b8c\u6210\u3002\u9996\u5148\uff0c\u6211\u5011\u9700\u8981\u5b9a\u7fa9\u4e00\u500b List \u7d44\u4ef6\uff0c\u4e26\u5c07 List \u4e2d\u7684\u6578\u64da\u50b3\u5165 List \u7d44\u4ef6\u4e2d\uff1a<\/p>\n

\nconst List = (props) => {\n  const { data } = props;\n  return (\n    
\n      {data.map((item, index) => (\n        
{item}<\/div>\n      ))}\n    <\/div>\n  );\n};\n<\/pre>\n
\u63a5\u4e0b\u4f86\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 List \u7d44\u4ef6\u4f86\u6c42\u51fa List \u4e2d\u6578\u64da\u7684\u6807\u51c6\u5dee (standard deviation)\uff1a<\/p>\n
\nconst standardDeviation = (data) => {\n  const mean = data.reduce((a, b) => a + b, 0) \/ data.length;\n  const variance = data.reduce((a, b) => a + Math.pow(b - mean, 2), 0) \/ data.length;\n  return Math.sqrt(variance);\n};\n<\/pre>\n
\u4e0a\u9762\u7684\u4ee3\u78bc\u4e2d\uff0c\u6211\u5011\u9996\u5148\u4f7f\u7528 reduce() \u65b9\u6cd5\u6c42\u51fa List \u4e2d\u6578\u64da\u7684\u5e73\u5747\u503c\uff0c\u7136\u5f8c\u4f7f\u7528 reduce() \u65b9\u6cd5\u6c42\u51fa List \u4e2d\u6578\u64da\u7684\u8b8a\u7570\u6578\uff0c\u6700\u5f8c\u4f7f\u7528 Math.sqrt() \u65b9\u6cd5\u6c42\u51fa List \u4e2d\u6578\u64da\u7684\u6807\u51c6\u5dee (standard deviation)\u3002<\/p>\n
\u73fe\u5728\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 List \u7d44\u4ef6\u548c standardDeviation() \u51fd\u6578\u4f86\u6c42\u51fa List \u4e2d\u6578\u64da\u7684\u6807\u51c6\u5dee (standard deviation)\uff1a<\/p>\n
\nconst data = [1, 2, 3, 4, 5];\nconst sd = standardDeviation(data);\n\nReactDOM.render(\n  ,\n  document.getElementById('root')\n);\n\nconsole.log(sd); \/\/ 1.5811388300841898\n<\/pre>\n
\u5728\u4e0a\u9762\u7684\u4ee3\u78bc\u4e2d\uff0c\u6211\u5011\u5b9a\u7fa9\u4e86\u4e00\u500b List \u7d44\u4ef6\uff0c\u4e26\u5c07 List \u4e2d\u7684\u6578\u64da\u50b3\u5165 List \u7d44\u4ef6\u4e2d\uff0c\u7136\u5f8c\u4f7f\u7528 standardDeviation() \u51fd\u6578\u6c42\u51fa List \u4e2d\u6578\u64da\u7684\u6807\u51c6\u5dee (standard deviation)\uff0c\u6700\u5f8c\u5c07 List \u7d44\u4ef6\u6e32\u67d3\u5230\u9801\u9762\u4e0a\uff0c\u4e26\u5c07\u6c42\u51fa\u7684\u6807\u51c6\u5dee (standard deviation) \u6253\u5370\u5230\u63a7\u5236\u53f0\u4e2d\u3002<\/p>\n
\u7e3d\u7d50\uff1a\u4f7f\u7528 React.JS \u6c42 List \u7684\u6807\u51c6\u5dee (standard deviation) \u975e\u5e38\u7c21\u55ae\uff0c\u53ea\u9700\u8981\u4f7f\u7528 List \u7d44\u4ef6\u548c standardDeviation() \u51fd\u6578\u5c31\u53ef\u4ee5\u5b8c\u6210\u3002<\/p>\n
<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u4ecb\u7d39\u4e86\u5982\u4f55\u4f7f\u7528 React.JS \u6c42 List \u7684\u6807\u51c6\u5dee (standard deviation)\u3002\u6211\u5011\u9996\u5148\u5b9a\u7fa9\u4e86\u4e00\u500b List \u7d44\u4ef6\uff0c\u4e26\u5c07 List \u4e2d\u7684\u6578\u64da\u50b3\u5165 List \u7d44\u4ef6\u4e2d\uff0c\u7136\u5f8c\u4f7f\u7528 standardDeviation() \u51fd\u6578\u6c42\u51fa List \u4e2d\u6578\u64da\u7684\u6807\u51c6\u5dee (standard deviation)\uff0c\u6700\u5f8c\u5c07 List \u7d44\u4ef6\u6e32\u67d3\u5230\u9801\u9762\u4e0a\uff0c\u4e26\u5c07\u6c42\u51fa\u7684\u6807\u51c6\u5dee (standard deviation) \u6253\u5370\u5230\u63a7\u5236\u53f0\u4e2d\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6587\u7ae0\u6458\u8981\uff1a\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528React.JS\u6c42\u53d6\u6a19\u6e96\u5dee\uff0c\u4e26\u63d0\u4f9b\u7c21\u55ae\u7684\u7a0b\u5f0f\u78bc\u793a\u4f8b\uff0c\u8b93\u8b80\u8005\u53ef\u4ee5\u8f15\u9b06\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528React.JS\u6c42\u53d6\u6a19\u6e96\u5dee\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[184,183],"tags":[182,181],"class_list":["post-5717","post","type-post","status-publish","format-standard","hentry","category-react","category-react-js","tag-react","tag-react-js"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_shortlink":"https:\/\/wp.me\/pcFK27-1ud","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5717","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/comments?post=5717"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5717\/revisions"}],"predecessor-version":[{"id":5718,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5717\/revisions\/5718"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=5717"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=5717"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=5717"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}