{"id":672,"date":"2023-07-29T03:39:17","date_gmt":"2023-07-29T03:39:17","guid":{"rendered":"https:\/\/statorials.org\/cn\/%e9%b1%bc%e7%b1%bb%e5%88%86%e5%b8%83%e5%9b%be-r\/"},"modified":"2023-07-29T03:39:17","modified_gmt":"2023-07-29T03:39:17","slug":"%e9%b1%bc%e7%b1%bb%e5%88%86%e5%b8%83%e5%9b%be-r","status":"publish","type":"post","link":"https:\/\/statorials.org\/cn\/%e9%b1%bc%e7%b1%bb%e5%88%86%e5%b8%83%e5%9b%be-r\/","title":{"rendered":"\u5982\u4f55\u5728 r \u4e2d\u7ed8\u5236\u6cca\u677e\u5206\u5e03"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">\u8981\u7ed8\u5236 R \u4e2d<a href=\"https:\/\/statorials.org\/cn\/\u9c7c\u7c7b\u5206\u5e03\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u6cca\u677e\u5206\u5e03<\/a>\u7684\u6982\u7387\u8d28\u91cf\u51fd\u6570\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u51fd\u6570\uff1a<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>dpois(x, lambda)<\/strong>\u521b\u5efa\u6982\u7387\u8d28\u91cf\u51fd\u6570<\/span><\/li>\n<li><span style=\"color: #000000;\"><strong>plot(x, y, type = &#8216;h&#8217;)<\/strong>\u7ed8\u5236\u6982\u7387\u8d28\u91cf\u51fd\u6570\uff0c\u6307\u5b9a\u8be5\u56fe\u662f\u76f4\u65b9\u56fe (type=&#8217;h&#8217;)<\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000;\">\u8981\u7ed8\u5236\u6982\u7387\u8d28\u91cf\u51fd\u6570\uff0c\u53ea\u9700\u6307\u5b9a<strong>lambda<\/strong> <strong>&nbsp;<\/strong> \uff08\u4f8b\u5982\u4e8b\u4ef6\u7684\u53d1\u751f\u7387\uff09\u5728<strong>dpois()<\/strong>\u51fd\u6570\u4e2d\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u4f8b\u5982\uff0c\u4ee5\u4e0b\u4ee3\u7801\u8bf4\u660e\u4e86\u5982\u4f55\u7ed8\u5236 lambda = 5 \u7684\u6cca\u677e\u5206\u5e03\u7684\u6982\u7387\u8d28\u91cf\u51fd\u6570\uff1a<\/span> <\/p>\n<pre style=\"background-color: #e5e5e5; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#define range of \"successes\"<\/span>\nsuccess &lt;- 0:20\n\n<span style=\"color: #008080;\">#create plot of probability mass function<\/span>\nplot(success, dois(success, lambda=5), type='h')\n<\/strong><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-6454 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/poissonr1.png\" alt=\"\u6cca\u677e\u6982\u7387\u8d28\u91cf\u51fd\u6570\" width=\"421\" height=\"387\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">x \u8f74\u663e\u793a\u201c\u6210\u529f\u201d\u7684\u6570\u91cf\uff08\u4f8b\u5982\u53d1\u751f\u7684\u4e8b\u4ef6\u7684\u6570\u91cf\uff09\uff0cy \u8f74\u663e\u793a\u5728 20 \u6b21\u8bd5\u9a8c\u4e2d\u5b9e\u73b0\u8be5\u6210\u529f\u6b21\u6570\u7684\u6982\u7387\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u6211\u4eec\u53ef\u4ee5\u6dfb\u52a0\u6807\u9898\u3001\u66f4\u6539\u8f74\u6807\u7b7e\u5e76\u589e\u52a0\u7ebf\u6761\u5bbd\u5ea6\u4ee5\u4f7f\u7ed8\u56fe\u66f4\u52a0\u7f8e\u89c2\uff1a<\/span> <\/p>\n<pre style=\"background-color: #e5e5e5; font-size: 15px;\"> <strong>success &lt;- 0:20\n\nplot(success, dois(success, lambda=5),\n     type='h',\n     main='Fish Distribution (lambda = 5)',\n     ylab='Probability',\n     xlab ='# Successes',\n     lwd=3)\n<\/strong><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-6455 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/poissonr2.png\" alt=\"R\u4e2d\u7684\u6cca\u677e\u5206\u5e03\u6982\u7387\u8d28\u91cf\u51fd\u6570\" width=\"419\" height=\"420\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p><span style=\"color: #000000;\">\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\u6765\u83b7\u53d6\u56fe\u8868\u4e2d\u663e\u793a\u7684\u6bcf\u4e2a\u6210\u529f\u6b21\u6570\u7684\u5b9e\u9645\u6982\u7387\uff1a<\/span><\/p>\n<pre style=\"background-color: #e5e5e5; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#prevent R from displaying numbers in scientific notation<\/span>\noptions(scipen=999) \n\n<span style=\"color: #008080;\">#define range of successes\n<\/span>success &lt;- 0:20\n\n<span style=\"color: #008080;\">#display probability of success for each number of trials\n<\/span>dpois(success, lambda=5)\n\n[1] 0.0067379469991 0.0336897349954 0.0842243374886 0.1403738958143\n[5] 0.1754673697679 0.1754673697679 0.1462228081399 0.1044448629571\n[9] 0.0652780393482 0.0362655774156 0.0181327887078 0.0082421766854\n[13] 0.0034342402856 0.0013208616483 0.0004717363030 0.0001572454343\n[17] 0.0000491391982 0.0000144527054 0.0000040146404 0.0000010564843\n[21] 0.0000002641211\n<\/strong><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u8981\u7ed8\u5236 R \u4e2d\u6cca\u677e\u5206\u5e03\u7684\u6982\u7387\u8d28\u91cf\u51fd\u6570\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u51fd\u6570\uff1a dpois(x, lambda)\u521b\u5efa\u6982\u7387\u8d28\u91cf\u51fd\u6570 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-672","post","type-post","status-publish","format-standard","hentry","category-11"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u5982\u4f55\u5728 R \u4e2d\u7ed8\u5236\u6cca\u677e\u5206\u5e03 - Statorials<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8e\u5982\u4f55\u5728 R \u4e2d\u7ed8\u5236\u6cca\u677e\u5206\u5e03\u7684\u7b80\u5355\u8bf4\u660e\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/statorials.org\/cn\/\u9c7c\u7c7b\u5206\u5e03\u56fe-r\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" 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