{"id":386,"date":"2023-03-16T01:22:37","date_gmt":"2023-03-16T01:22:37","guid":{"rendered":"https:\/\/yunshangtulv.com.cn\/?p=386"},"modified":"2023-03-16T01:22:37","modified_gmt":"2023-03-16T01:22:37","slug":"%e6%95%b0%e7%bb%84%e8%af%a6%e8%a7%a3%e5%8f%8a%e5%ba%94%e7%94%a8%e4%b8%be%e4%be%8b","status":"publish","type":"post","link":"https:\/\/yunshangtulv.com.cn\/?p=386","title":{"rendered":"\u6570\u7ec4\u8be6\u89e3\u53ca\u5e94\u7528\u4e3e\u4f8b"},"content":{"rendered":"<p>\u5728R\u8bed\u8a00\u4e2d\uff0c\u6570\u7ec4(array)\u662f\u4e00\u79cd\u591a\u7ef4\u6570\u636e\u7ed3\u6784\uff0c\u5b83\u53ef\u4ee5\u5305\u542b\u76f8\u540c\u7c7b\u578b\u7684\u6570\u636e\u5143\u7d20\u3002R\u8bed\u8a00\u4e2d\u7684\u6570\u7ec4\u53ef\u4ee5\u662f\u4e8c\u7ef4\u3001\u4e09\u7ef4\u6216\u66f4\u9ad8\u7ef4\u7684\u6570\u636e\u7ed3\u6784\u3002\u5728R\u8bed\u8a00\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u51fd\u6570array()\u521b\u5efa\u6570\u7ec4\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u521b\u5efa\u4e8c\u7ef4\u6570\u7ec4\u7684\u793a\u4f8b\uff1a<\/p>\n<div class=\"bg-black rounded-md mb-4\">\n<div class=\"p-4 overflow-y-auto\"><code class=\"!whitespace-pre hljs language-r\"><span class=\"hljs-comment\"># \u521b\u5efa\u4e00\u4e2a3\u884c4\u5217\u7684\u6570\u7ec4<\/span><br \/>\narr <span class=\"hljs-operator\">&lt;-<\/span> array<span class=\"hljs-punctuation\">(<\/span><span class=\"hljs-number\">1<\/span><span class=\"hljs-operator\">:<\/span><span class=\"hljs-number\">12<\/span><span class=\"hljs-punctuation\">,<\/span> <span class=\"hljs-built_in\">dim<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-built_in\">c<\/span><span class=\"hljs-punctuation\">(<\/span><span class=\"hljs-number\">3<\/span><span class=\"hljs-punctuation\">,<\/span> <span class=\"hljs-number\">4<\/span><span class=\"hljs-punctuation\">)<\/span><span class=\"hljs-punctuation\">)<\/span><br \/>\nprint<span class=\"hljs-punctuation\">(<\/span>arr<span class=\"hljs-punctuation\">)<\/span><br \/>\n<\/code><\/div>\n<\/div>\n<p>\u8fd9\u4e2a\u793a\u4f8b\u5c06\u4f1a\u521b\u5efa\u4e00\u4e2a3\u884c4\u5217\u7684\u6570\u7ec4\uff0c\u5176\u4e2d\u7684\u5143\u7d20\u4e3a1\u523012\u7684\u6574\u6570\u3002\u51fd\u6570array()\u63a5\u53d7\u4e00\u4e2a\u6570\u636e\u5411\u91cf\u548c\u4e00\u4e2adim\u53c2\u6570\u6765\u6307\u5b9a\u6570\u7ec4\u7684\u7ef4\u5ea6\u3002<\/p>\n<p>\u63a5\u4e0b\u6765\u662f\u4e00\u4e9bR\u8bed\u8a00\u4e2d\u6570\u7ec4\u7684\u5e38\u7528\u64cd\u4f5c\u53ca\u5e94\u7528\u4e3e\u4f8b\uff1a<\/p>\n<ol>\n<li>\n<h3>\u8bbf\u95ee\u6570\u7ec4\u5143\u7d20<\/h3>\n<\/li>\n<\/ol>\n<p>\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4e0b\u6807\u6765\u8bbf\u95ee\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u3002\u4f8b\u5982\uff0c\u5bf9\u4e8e\u4e0a\u9762\u7684\u793a\u4f8b\u6570\u7ec4\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528arr[1, 2]\u6765\u8bbf\u95ee\u7b2c1\u884c\u7b2c2\u5217\u7684\u5143\u7d20\u3002<\/p>\n<ol start=\"2\">\n<li>\n<h3>\u6570\u7ec4\u7684\u8f6c\u7f6e<\/h3>\n<\/li>\n<\/ol>\n<p>\u4f7f\u7528\u51fd\u6570aperm()\u53ef\u4ee5\u5c06\u6570\u7ec4\u8f6c\u7f6e\uff0c\u4e0d\u4ec5\u53ef\u4ee5\u4ea4\u6362\u884c\u548c\u5217\uff0c\u8fd8\u53ef\u4ee5\u4ea4\u6362\u66f4\u9ad8\u7ef4\u7684\u7ef4\u5ea6\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6211\u4eec\u60f3\u5c06\u4e0a\u9762\u7684\u793a\u4f8b\u6570\u7ec4arr\u8f6c\u7f6e\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e0b\u9762\u7684\u4ee3\u7801\uff1a<\/p>\n<div class=\"bg-black rounded-md mb-4\">\n<div class=\"p-4 overflow-y-auto\"><code class=\"!whitespace-pre hljs language-r\">aperm<span class=\"hljs-punctuation\">(<\/span>arr<span class=\"hljs-punctuation\">,<\/span> <span class=\"hljs-built_in\">c<\/span><span class=\"hljs-punctuation\">(<\/span><span class=\"hljs-number\">2<\/span><span class=\"hljs-punctuation\">,<\/span> <span class=\"hljs-number\">1<\/span><span class=\"hljs-punctuation\">)<\/span><span class=\"hljs-punctuation\">)<\/span><br \/>\n<\/code><\/div>\n<\/div>\n<p>\u8fd9\u4e2a\u4ee3\u7801\u5c06\u4f1a\u5c06arr\u6570\u7ec4\u7684\u884c\u548c\u5217\u4ea4\u6362\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a4\u884c3\u5217\u7684\u65b0\u6570\u7ec4\u3002<\/p>\n<ol start=\"3\">\n<li>\n<h3>\u6570\u7ec4\u7684\u7ef4\u5ea6\u548c\u957f\u5ea6<\/h3>\n<\/li>\n<\/ol>\n<p>\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u51fd\u6570dim()\u6765\u83b7\u53d6\u6570\u7ec4\u7684\u7ef4\u5ea6\uff0c\u4f7f\u7528length()\u6765\u83b7\u53d6\u6570\u7ec4\u7684\u957f\u5ea6\u3002\u4f8b\u5982\uff0c\u5bf9\u4e8e\u4e0a\u9762\u7684\u793a\u4f8b\u6570\u7ec4\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4e0b\u9762\u7684\u4ee3\u7801\u6765\u83b7\u53d6\u6570\u7ec4\u7684\u7ef4\u5ea6\u548c\u957f\u5ea6\uff1a<\/p>\n<div class=\"bg-black rounded-md mb-4\">\n<div class=\"p-4 overflow-y-auto\"><code class=\"!whitespace-pre hljs language-r\"><span class=\"hljs-comment\"># \u83b7\u53d6\u6570\u7ec4\u7684\u7ef4\u5ea6<\/span><br \/>\n<span class=\"hljs-built_in\">dim<\/span><span class=\"hljs-punctuation\">(<\/span>arr<span class=\"hljs-punctuation\">)<\/span><\/p>\n<p><span class=\"hljs-comment\"># \u83b7\u53d6\u6570\u7ec4\u7684\u957f\u5ea6<\/span><br \/>\n<span class=\"hljs-built_in\">length<\/span><span class=\"hljs-punctuation\">(<\/span>arr<span class=\"hljs-punctuation\">)<\/span><br \/>\n<\/code><\/div>\n<\/div>\n<ol start=\"4\">\n<li>\n<h3>\u6570\u7ec4\u7684\u91cd\u5851<\/h3>\n<\/li>\n<\/ol>\n<p>\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u51fd\u6570reshape()\u6765\u91cd\u65b0\u6784\u9020\u6570\u7ec4\u7684\u7ef4\u5ea6\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6211\u4eec\u6709\u4e00\u4e2a4\u884c3\u5217\u7684\u6570\u7ec4arr\uff0c\u5e76\u60f3\u5c06\u5b83\u91cd\u5851\u4e3a3\u884c4\u5217\u7684\u6570\u7ec4\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e0b\u9762\u7684\u4ee3\u7801\uff1a<\/p>\n<div class=\"bg-black rounded-md mb-4\">\n<div class=\"p-4 overflow-y-auto\"><code class=\"!whitespace-pre hljs language-r\"><span class=\"hljs-comment\"># \u91cd\u5851\u6570\u7ec4\u4e3a3\u884c4\u5217<\/span><br \/>\nnew_arr <span class=\"hljs-operator\">&lt;-<\/span> reshape<span class=\"hljs-punctuation\">(<\/span>arr<span class=\"hljs-punctuation\">,<\/span> <span class=\"hljs-built_in\">c<\/span><span class=\"hljs-punctuation\">(<\/span><span class=\"hljs-number\">3<\/span><span class=\"hljs-punctuation\">,<\/span> <span class=\"hljs-number\">4<\/span><span class=\"hljs-punctuation\">)<\/span><span class=\"hljs-punctuation\">)<\/span><br \/>\nprint<span class=\"hljs-punctuation\">(<\/span>new_arr<span class=\"hljs-punctuation\">)<\/span><br \/>\n<\/code><\/div>\n<\/div>\n<p>\u4ee5\u4e0a\u5c31\u662fR\u8bed\u8a00\u4e2d\u6570\u7ec4\u7684\u4e00\u4e9b\u5e38\u7528\u64cd\u4f5c\u53ca\u5e94\u7528\u4e3e\u4f8b\u3002\u6570\u7ec4\u662f\u4e00\u79cd\u91cd\u8981\u7684\u591a\u7ef4\u6570\u636e\u7ed3\u6784\uff0c\u53ef\u4ee5\u7528\u4e8e\u5b58\u50a8\u548c\u5904\u7406\u8bb8\u591a\u7c7b\u578b\u7684\u6570\u636e\u3002\u5728R\u8bed\u8a00\u4e2d\uff0c\u6570\u7ec4\u7684\u64cd\u4f5c\u548c\u4f7f\u7528\u65b9\u6cd5\u975e\u5e38\u7075\u6d3b\uff0c\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u66f4\u597d\u5730\u5904\u7406\u548c\u5206\u6790\u6570\u636e\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728R\u8bed\u8a00\u4e2d\uff0c\u6570\u7ec4(array)\u662f\u4e00\u79cd\u591a\u7ef4\u6570\u636e\u7ed3\u6784\uff0c\u5b83\u53ef\u4ee5\u5305\u542b\u76f8\u540c\u7c7b\u578b\u7684\u6570\u636e\u5143\u7d20\u3002R\u8bed\u8a00\u4e2d\u7684\u6570\u7ec4\u53ef\u4ee5\u662f\u4e8c\u7ef4\u3001\u4e09\u7ef4 [&hellip;]<\/p>\n","protected":false},"author":111,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[],"class_list":["post-386","post","type-post","status-publish","format-standard","hentry","category-r"],"_links":{"self":[{"href":"https:\/\/yunshangtulv.com.cn\/index.php?rest_route=\/wp\/v2\/posts\/386","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yunshangtulv.com.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yunshangtulv.com.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yunshangtulv.com.cn\/index.php?rest_route=\/wp\/v2\/users\/111"}],"replies":[{"embeddable":true,"href":"https:\/\/yunshangtulv.com.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=386"}],"version-history":[{"count":0,"href":"https:\/\/yunshangtulv.com.cn\/index.php?rest_route=\/wp\/v2\/posts\/386\/revisions"}],"wp:attachment":[{"href":"https:\/\/yunshangtulv.com.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=386"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yunshangtulv.com.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=386"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yunshangtulv.com.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=386"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}